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Hy dear Bitmain and dogie,
unfortunately the "new" S4+ has no significant improvement in power to hash ratio and on my personal opinion a decrease in attraction for home miners in Middle europe, US and other countries above €$0,15/kWH.
If i may post a wish for a S6 or S7, this would be 0,25W/GH and a noise level below 30db. Technically this should not be an issue for a legit company as bitmain is  ;)

Kind regards,
elrippo

I don't know if I would agree with all of this.  I think home miners are starting to look at 220/240 so I'm glad to see them jump into this level.  It allows for a lot in future.

As far as .15 KWH in euros you might look into hosting centers I think you will be able to get it cheaper.  Also avoid I'm guessing a Europe vat depending on the location of hosting you choose.

Bitmain, please treat the S4+ and it's users better than you did the S4's.

I personally am a fan of hosting my hardware at a location that i have immediate access to, virtually as physically. Unfortunately other countries have a quite huge advantage in terms of power cost and taxiation.
If i remember wright, this is a community driven effort, and it should be possible, nearly possible for everyone to dedicate to it. With the current FIAT ratio and costs to mine, several countries if not continents have a disadvantage which can be partially compensated by technology.
Bitmain seems to drive this as a big player in the industrie and serves home miners, and before i write further, i really appreciate this, so i do not think that this is technically a issue, this is more a strategic and philosophic state.

I don´t have to mine at 220/2240 here in Middleurope with a rasing diff of 3%. It starts getting profitable above 335/340 for one year, maybe 18 months.

https://farm9.staticflickr.com/8751/17240307015_4fc7165728_o.jpg

nice patches on the right side!
air quality control on the ''testing site'' is beautiful!

That's the underside, pressed tight against the heatsink. You can see from the heatsink picture (https://farm6.staticflickr.com/5326/17240323325_c20a405ced_o.jpg) that those areas are fully enclosed and not exposed to the air what so ever.

You should know doggie you get yours free !

Mini Review: I have a couple S4 Plus units in hand that I have been running for about an hour or so.

Getting about 2550 GHs on each one, running on a pool that is known to lose some hash rate.

Measured about 6.2 - 6.3 Amps / 12.5 Amps for the Pair on 220v (235v) = 1470 Watts Each at the Wall.
So I personally am getting about .57 Efficiency which is slightly better then advertised.  

About the same sound / noise level of a normal S4, only hear the high pitch PSU fan if very close up.
I am getting some vibration noise, from both of them, which is unusual, as I never had before in any S4 Units.

Overall, Not Bad, A tad overpriced. People want the S6 with the new chips, this is something at least until then.

Anyhow I have them up for sale if anyone wants them shipped out today from New York.

I'm convinced the S4+ is just an attempt to make the S5 look like a better value, so they'll sell more of them. This is a marketing trick to make the lower priced product seem like a better value.

That could be and wouldn't surprise me.  Just the same if the S2 upgrade kits ever get released with the initial specs the S5 and S4+ miners won't sell.

I don't know if I would say that.  If you had a warehouse or huge operation this would be a nice product as far as the amount of hash it brings.

With not being 110 its not a product for all, but there are some out there that are it's "ideal" customers.

Ideal customers, anyone that cares about power efficiency and has plumbed 205V+ in already? I paid all of $150 to have an electrician drop in two 240V 20A circuits and they've been paying for themselves with EVGA, LEPA, Antminer, other PSUs running an average of almost 10% more efficient.

And your $150 get's thrown right out the window when you realize that the s4+ is an extra $200 more than the equivalent 2 S5s. And so your 240v line is saving you what? 3 cents an hour?

 The included PSU cannot be used in countries with a mains power voltage lower than 205V. The PSU will not start below this voltage.

Does this mean a Home in the USA can not use this as its only 110 service?

That's exactly what it means.  Unless you've got your home wired with some double pole breakers that'll give you the 240V, this product is not for you.

Aren't American Dryers 220v?

Good luck convincing the little lady that she's got to hang your clothes out to dry because you're replacing her dryer with some miners :P.

Electric Stove is also 220... Whats the connectors for 220v to the back of a S4+??? L6-30P to C13 Right?

Yes, so you might soften the blow by telling her she no longer needs to cook anything.

The point is, the double pole breakers you've already got in your panel are already being used for other purposes: stove/range, dryer, central AC, etc.  Virtually every other circuit you've got in your box is a standard 120V single pole.  To use an S4+ at home, you're either going to have to do something silly like replace your appliances with miners or install a dedicated circuit or two (and likely get your total amperage increased to handle the additional load).

How many amps is a 1500w Miner going to pull on a 220/240v Circuit?? my math says like 6.25... thats nothing

 (meaning I can safely run 3 S4+ on a single 20A 220)

At 240V it's 6.25A.  Meaning you can safely run 2 on a 240V/20A circuit.  You only load a breaker to 80% for constant draw.
At 220V it's 6.82A.  Again, you can safely run 2 on that circuit.

Anyway, Bitmain choosing to basically abandon the typical US consumer is an unpleasant reality now.

Because this product doesn't fit your situation doesn't mean they've abandoned you. The S4+ might not be for you and that's okay.

What it does is set a precedent.  Until the S4+ every single product Bitmain released was usable by everyone - from the home hobbyist to the industrial scale farm.  With this, they have completely alienated the entire US home miner market.

To be fair, I had no intention of buying a revamp of last-gen tech, so this product was not for me to begin with.  I'm hopeful that Bitmain will introduce an S7 or similar that will still cater to those of us who continue to mine at home.  However, I also understand the economics of it and realize that unless there's a dramatic shift in the Bitcoin ecosystem, home mining is effectively dead.

during good months of home mining 5k to 7k power earned me 3 thousand a month. Not most months 4 or 5 of  the last 35 months.

this past Jan 2015   6k of power and 12th of hash I got 4 coins and spent  600 usd on power a net of 200usd.

I will not expect to earn 1k a month during any month of 2015. 

The most power I can use is 6 or 7k during cold winter months. If I could buy 2 10 th machines that use 3k  watts each I would buy them as far as i know they do not exist .

I am not particulary happy with the fact that Bitmain decided to not build in an LCD screen.
Even more so, I just hate the fact that there is no "buzzer"
Why would they do that, it was convenient and a good thing to have. The buzzer is just important to have.
Does anyone know WHY they decided to not include an LCD and an buzzer in this model?
For the price and especially the power usage they could at least have placed(keeped) the buzzer..why did they remove it, where they did have it in the "normal" S4..?

Few things:
1) Stock moved from static to DHCP so it can't get stuck on random IPs, which was the main purpose of the LCD.
2) Its got a quick setup button for minerlink, which works similar to WPS devices on a router.
3) Almost no overclocking (overheats) and no underclocking (fixed voltage so constant W/GH). Makes reporting GH/s rather pointless.
4) The buzzer annoyed people more than anything. In small farms it was annoying, in large farms it was often difficult to locate.
5) The buzzer often wouldn't disable properly which was exceptionally annoying.
6) Did I mention the buzzer was annoying? :P Maybe it will reappear in another model though.

Thanks for the information dogie. :)
I would personally still prefer the LCD, and, a working, buzzer tho, even if you dont overclock the GH/s rate would be gr8 to see in my opinion.
So u can see if it still runs at the speed in GH/s u want, meaning no hardware failure probably and most likely, and there are difficulty raises in Bitcoin of course. And IP adress just like the max temp is good to see as well, convenient, in my opinion.

U also know the answer on what the MTBF, Main Time Before Failure, on average, in good environment conditions, would be? :)
(Since the warranty is short, just like on all other miners tho)

I don't know, and don't know how much data we'd need. Perhaps it could be done on other miners, the oldest Bitmain hardware should be about 15 months old by now.

Our first generation Miner S1 produced in October of 2013, are still hashing!
S2 released in April of 2014 are still hashing!

Warranty is 90-days, however, most hardware do last well over 1 year and S1 as an example, 18 months and still hashing!

Ok thanks!
Im glad to hear that! :)

But strange, at least here in Italy and Europe guarantee of any product is at least two years, I do not know why you bitmain of dates only 90 days warranty. This and a mystery :-\

Miner's do not have near this long of warranty.  It's not bitmain who only does this, but 90 day's is pretty standard for asics.

This gives you enough time to set it up, make sure not DOA.  Also time to set up and get it working properly.   So within the 90 day's you have a lot of time to set up and make sure miner works right.    With how miners switch generations there is no way to do a warranty of near two years.

They stop making the parts way before 2 years.  They move on to next machines, possible different generations.   So even if they wanted to there would just not be parts to do it.

*Please read comment below it appears they have some parts for each generation :)

Do remember that products sold from a non EU seller to an EU buyers don't have the same rights as EU sellers to EU buyers. Although KNCMiner's legal team seemed to conclude they could sell with 90 days with EU to EU.

Bitcoin Miner is a Specialty Item at the moment.  (Fortunately or Unfortunately)

Bitcoin Mining Hardware, the life span can be very short.

At least Bitmain Hardware sold directly from Bitmaintech.com is sold from Hong Kong, SAR, China.  A special district within China.  

You can certainly buy from some resellers in EU.  Some of the person resells Antminer even post comments here time to time for Antminer products and also provide technical assistance.  They may be held on the EU standard but not when you buy direct from the Hong Kong Company.

Direct Sale only covers the original buyer for the 90-day warranty.

Bitmain is strive to make better and long lasting hardware every day, however, bitcoin mining hardware is still a very early stage mathmatical system that is specially build for a small nitch of market by special demand.

Please be patient with us and we will try to remain the best in Warranty when it comes to the industry standard.


P.S:
We do have S1, S2, S3, S3+, S4, S4+, S5 and U1 and U2 parts are held for Special Request from EU customers for the units that were sold from some of the local warranty centers of Bitmain USA to be compliance of the EU Consumer Protection Regulations as well as the regulations in USA.


Hope this helps a bit

Replace with LED Strobe.. :)

You missed out U3, poor U3 :(



I wouldn't be against some aggressive LEDs at all. If someone's walking round the farm looking for the unit which is down it should be pretty obvious, although the tradeoff is that it won't alert you to a downed machine. You'd have to know there is a machine down.

@dogie,

We do not carry any U3 for RMA in USA, EU, SouthEast Asia, and Ukraine centers.

Sooo...

3.9 BTC for something that will never mine 3.9 BTC back and will consume 1480w 24/7 (hundreds of $$$)


Is Bitmain high or something ?



Did i miss something ?

It will take about a year I guess, to mine 3.9BTC with the S4+.
Could be a bit earlyer but I guess about 10 months.
It's up to you and me if we going to take the gamble if we think the price will gain alot or not.

My Bitmain Antminer S4+ rebooted and now shows a solid red light only on the front. What does this mean? Solution?

LED codes:

Is it possible your unit overheated?

You won't make it if you factor electricity cost and all the work you'll put into this crap.

Just buy 3.9BTC with the money you are going to spend on that machien and hold these BTC. You'll end up with more BTC (3.9 instead of 1,2 or maybe 3).

Possible but unlikely.

@MidwestMiner,

Can you open the top cover and video record how all the LEDs are acting to include the blue Beagle Bone led and ethernet port LED?

Red LED indicate, the system detected an error. 

Please go to the System Log/Kernel Log and see if you can grab that data.

I so not have physical access but it seems a hard reboot and factory reset solved it. Probably was a overheat. If I experience further issues i ll make sure to get pictures etc.

saw the reaction of the members of this forum and people who have experience in the mining, regarding this new product S4 + .. it is a great disappointment for most part of them !!
for me this new product only slows the progress of Bitcoin and minors .. UNFORTUNATELY

I am almost 40 years old and support slowing the progress of minors 100%, let kids be kids!

You are missing a huge jump for Bitmain.  They went to the 220/240.  This is HUGE as far as future designs.

If they don't lock all miners to the 110/120  it opens the door to much bigger miners.

I am curious about it, so I'll get one soon. Looking forward to test it... Not sure if it's as bad as everyone thinks, used in the right environment.

LOL... well played sir :)

I am hearing the S4+ hangs at reboot like the C1 did. Can anyone Document this? is there anyone that has seen this?

Not seen it on my unit, seems to reboot fine via software. Did it about 20x while testing. Possibly its because its constant voltage while the [most] C1's aren't?

A question or two.

  First any coupons on these?
Second what does an underclock get you?

Does anyone try this at 2200gh or 2300gh?

@BitmainTech

I am working with a MFG. to build a Water cooling block for myself, and a Friend.

Can I PLEASE have the specifications for spacing and Attachment points for the S4+ ???

(if it helps, If this works I'll be buying 3 more units, and my Friend will be purchasing 20 more units)

And I would be more than willing to give you a sample of the watercooling block once they are made.

Doge has his chart its not bad running ay 2th

I am testing at stock speed for the moment and after I will play around with lower settings. Here are results:

https://i.imgur.com/veSkHAC.jpg

https://i.imgur.com/mqjc8VS.jpg

@bitmain my S4+

Is making some odd sounds...

All of my fans

Fan#    Fan1    Fan2    Fan3    Fan4
Speed (r/min)    3,840    3,840    3,840    3,840

My temp is:
64
63
68
65

So you want a video of the sound?

I have a full frequency range graph in my guide. Its almost perfectly linear power consumption going down due to the fixed voltage. Going up there's not enough thermal headroom for most people, and after 225 you have to start considering the PSU.

One post and happens to be on here? Caught red handed  ;D :-*

If your house is wired with 12 gauge wire and you are using 120 volts on a 20 amp breaker you should be pushing about 1900 watts on that circuit
@ 240 volts on the same set up about 3800 watts
Do not use 14 guage wire for this set up if the breaker doesn't go you will burn down you house and electrical fires are harder to put out.

It will be pushing the circuit a lot, but yes it would probley run.  I doubt most people know if they have 12 gauge is the scary part.  A lot if think this might just plug it in.... wire gets hot... bad things could happen.

As a general rule I would say its safer to stick with a regular 220/240 line with 10 gauge wire for this miner.

It's easy to check. Hit the breaker unscrew outlet pull out wire till you could read it straight from the wire. If it's and black wire that looks old don't try it. The wire your looking for tends to come in white or yellow but be sure to read gauge on it to make sure. Also make sure power is out in the socket before pulling it out. You can do that by plugging something in and when you hit the brake it wont turn on. Those loads are at 80% output mentioned above. I didnt want to say 100% max output because people could get the wrong impression that they could use the whole load. And unusually if you have a 20 amp properly installed it has a 12 gauge or thicker wire running to it.  So if it is a 1500w miner it should run no problem. Wow i just read  this. Unless it does have a L6-30P plug. Wow does it really?

Ok it doesn't. 30 amp is over kill for this but do as you will and if you use 30 amp use correct gauge wire. .

So it is not able to change freq + volts  just freq?

Correct, its string design = fixed off input voltage = ~12V / chips in string.

If it is a little older house cable depending on age of house could be grey.  It was popular during 90's on 12-2.  You can feel it being stiff compared to yellow new stuff.  

I suggest reading on it.   Hopefully it says 12-2 or something to that effect on wire.

My worry is that most of the outer insulation on those wires has worn down over the years with such a high load it could cause bad things to happen even though the old wiring may be capable of handling it?

I cannot speak for all old wiring.  I recently did some wiring for bitcoin miners in a new place.  And had some grey wire from the 90's.   It was in a box about 3/4 of it still there.

This grey 12-2 i a LOT thicker insulation then the yellow stuff.  I used both and either worked fine.  But granted this grey wire was not being activly used since 90's.  But it had set in a garage.   It is pretty amazing in you ever get the chance to compare the grey 12-2 and yellow 12-2.  The grey is FAR more substantial on all insulation (and a heck of a pain to strip).   Needless to say it is good wire.

But yes I would be worried about unknown wire when running  a S4+ on 110.

*Edited post as chain was very long read above for back story.

I agree as long as there is insulation still on it it's good. I'm worried about the wires where the insulation is falling of or warn to the copper typical of old houses and the black wire is the one i would watch out for because it tends to be the one worn. I havent ran into many grey wiring. I ran into houses which had no insulation what so ever on them but you would see that when you go into the basement and two large copper wires held up by wood pools. That was before insulation though. a good sign is if you have fuses beware. lol A striped wire may not cause much damage but if it runs close to another striped wire or if you are doing some remodeling banging in nails or pulling high voltage you could do some damage to your property or yourself. Too much on this topic way of track now.

If you have no insulation I would not run a miner for anything.   I live in a farm house over 100 years old, it has went through a few redoing of electricity wiring to make it safe.   There have been at least 2 huge jobs or 3 depending on if you count when a new addition was added.

You can get a receptacle tester to will show some common wiring problems: http://www.amazon.com/GE-3-Wire-Receptacle-Tester-50542/dp/B002LZTKIA/  If you don't pass this I would not mine.

I won't get anymore off topic if you don't know your wiring and are on 110 hire a electrician to be safe when dealing with amount of watts such as S4+.  As it was designed for 220/240 and that assumes proper wiring.

To keep it on topic, the S4+ won't even power up on 110V, so the entire discussion is pretty much rendered useless ;).  You need to throw these onto a 240V circuit, which as I mentioned earlier in the thread pretty much eliminates the vast majority of typical US households... unless you convince your better half to allow you to throw out the electric dryer and range in lieu of mining equipment :P

Or have an additional dedicated mining circuit wired up, which a lot of people do.

Yes, anybody who is going to dedicate themselves to mining is going to wire up service exclusively for it... and anybody with half a brain is not going to wire up 120V for the purpose :).  My point, which has remained consistent, is that the S4+ is not a "home" miner, like every other Bitmain product has been - at least for homes using 100V to 120V power (like the US, Canada, Japan, etc).

Yea i dont know about a lot of people but they are right why make something that requires a 240V. On top of that the price is ridiculous if you have to upgrade and dedicate a whole circuit to a miner that costs even more. When do you start to see an investment on your return is the whole point of this game.What i dont understand is why wont it fire up on 120v if the circuit has enough to power for the miner. Is there a biult-in kill switch which requires 240v for override.
(120v @ 20amp = 3800 watts) Enough juice for two miners
Seems like this one is going to end up in there mine.

Is this ok miner to start with?   Or too big for a newbie?

I would first ask what your electricity price is?  That will determine a lot.   I use this to tell people if they should get new or used.  For most it is new but if .05 or less used comes in nice sometimes.

Also do you have 110 or 220/240?  This miner was not made in mind for 110.   Some have done it.... but in my head it's risky to do.

Just let us know more info and we can help more.

I don't know how you figured 120 * 20 = 3800, but it doesn't. 120 * 20 = 2400 * 0.80 = 1920w usable.

Most people will not have 20A circuits, 15A is the standard:

120 * 15 = 1800 * 0.80 = 1440w usable.

You need 240V for these large machines. No getting around it. 240V is much easier on a PSU vs 120V.

Why the hell would anyone want to mine on 120V anyways? Takes 30 minutes to make a 240V circuit, less if you're converting an existing 120V line to 240V. Mining on 120V is for plebs.

I personally think 240 is the way to go.  I am happy they did.  It makes future releases possible to have a LOT more hash.  A lot of miners have put a 220/240 in, its just something that is necessary with some miners.   

120 you need to be careful.  Depending on amps of breaker it is possible on 120.... but if you dont know your wiring there could be a big problem.   I dont think going 120/110 is best thing to do.  Hire someone or put in 240 yourself.   (Some places have requirements where you need a electrician to do it)

6.82A on 220v 6.25A on 240v and 7.21A on 208v(common 3-phase commercial voltage in the US).

Basically for any circuit you don't want to be above 80% load, so you could calculate the useable watts on a circuit by multiplying circuit breaker amps times the line voltage times .8 .

If you are pushing a circuit close to capacity you should make sure you know the voltage is correct as there is a difference in available watts between the voltages, for example on a 30 amp circuit with 3 S4+'s you would have 492 watts left over at 208v 780 watts left over at 220v and 1260 watts left over at 240v using a standard 80% load calculation.

correct sir thats why when i posted the wattage i post marginally below 80% so there would be no surprises.  :-X

Got a S4+ today, new in box. But it doesn't power up (no leds flashing, no fans, nothing)... I am in Switzerland, so it's 220V and they say it should work if higher than 205V....

Any suggestions?

Thanks :)

Try to open the case & tighten all of cable connection  :)

From the PSU guide for no PSU fan and no output:

Power is all fine, can connect it to servers and they immediately power up. Will open it and have a look at it as soon as I am back at the datacenter. Thanks! :)

First of all, sorry for the large pictures..  ;D

Alright, opened it up and I am a bit shocked about build quality...

Spare (sharp) aluminium parts lyhing around in middle of the cables...
https://i.imgur.com/MlA9emz.jpg (http://imgur.com/MlA9emz)

So I did some messuring, definately an issue with the PSU. I opened it up and and it was clear why it's not working...
https://i.imgur.com/nR6eVuh.jpg (http://imgur.com/nR6eVuh)

I mean, really!?

Fixed the cable, no it's working... Actually things like that can be dangerous...

For anyone that cares I will be offering a S4/S4+ Water block, and Kit in the coming weeks I just need to get the engineering sample.

Let me know if anyone wants in I'll have 100% pricing with in 2 weeks.

Sure if it is priced reasonably...

In the future you can post small pictures with the below code:


Example:
https://i.imgur.com/MlA9emz.jpg (http://imgur.com/MlA9emz)

Wow, lucky it's didn't explode or damage the miner  ;D
The 12VDC is short to ground.

That doesn't doo anything, but it the splitter could have done worse damage.. :)

I am curious to know. What is the "normal" temp while hashing for this S4+ ? I can't find this information.

See the graph in https://bitcointalk.org/index.php?topic=1035629. 70-80C is considered normal for S4s, cutoff is 95C.

printscreen with temparature right now, it's running in our datacenter.

https://i.imgur.com/aGozgSC.png (http://imgur.com/aGozgSC)

Oh nice, you could slap on 225 reasonably easily then as W/GH goes up nearly linearly. [Note that's near the limit of the PSU, and WILL void your warranty].

I just bought one to have a look at it and play around, might test that, too. I like the fact that you (normally^^) don't have to mess around with psu's.. For now it looks ok, as Spondoolies seems not to sell at the moment, I will get some more of those S4+  :)

Will post another pic when it's a bit higher.

btw: it would be great if it was possible to restrict ui access, I only want the miner to be accessible from one (or more) ips... would appreciate if bitmain tech could add this feature in a future firmware upgrade :)

I think changing the password works just as good.  I would do that in mean time.

I could see a point to your suggestion, although I think it is something very few would use.

of course I changed the password. Each miner has a public ip, it's just simpler in a datacenter environment. So for me this feature would be a huge benefit.

WOW crazy amounts of heat!

I dont know about that seems some people are crediting Spondoolies with a better chance at finding a block. Technically I don't know how that works but they base it of experience. Maybe the reliability or better quality with less defects reason but you could bash this statement all you want with every hash has equal chance but I'm leaving this open ended.

As long as the hash is the same, the chance is the same.   Brand of machine does not make a difference of finding a block.

This assumes the machine does not have a problem, I guess you could have high latency or bad firmware that could cause it.  But Bitmain and SP gear both don't have firmware that can find blocks.

Can you point to where you read about "some people are crediting Spondoolies with a better chance at finding a block"?

hearsay among peers but unified with respects to there machines no official results 

Can you point to thread or article?  I just had not heard this and would be interested in reading it.

If you just want some TH, it doesn't matter, but if you want to scale big, Spoondolies is (my personal opinion) way in front.

If you compare a SP35 with a S4+ :

	S4+	SP35
Hashrate (GH/s)	2570	5500
Power consumption	1480	3650
Height	3 U	2 U
Price (USD)	946	2235

so far, so good. This results in...

	S4+	SP35
GH / USD	2.7	2.4
Watts / GH	0.57	0.66
Units / Rack (42U)	14	21
Hashrate / Rack	35.98 TH/s	115.5 TH/s

As you see, if you are looking for a device to generate some Hashrate, go with the S4+, but if you want to scale it big, the SP35 is the better choice. Of course it costs a bit more... Of course there is some more power consumption... But if you scale big, power will be much cheaper... Then it's all about the space you need to generate as much Hashrate as possible.

So, with one Rack I can make (let's say power costs are 5 cents)..:

	S4+	SP35
Income (USD)	2710	8702
Power Costs (USD)	745	2759
Profit (USD)	1965	5943

So, a rack is about 1m². If you are a business man and also have to pay for a room an racks, do you want to make USD 1965 per m² or do you want to make USD 5943 per m²?  ;)

The 21 SP35 in a rack will cost 46935, so (if you don't consider other costs) you will need 8 months to pay them... But then, you make the big money...
While the 14 S4+ will pay off after 7 months, but you make less money in a room that is even 3 times as big as the one you need for the SP35.

So as a business man, I would always go with the SP35, unfortunatley you can't get them anymore... So I need to go with the S4+, which is not so bad neither, but the device should be 2 U to make more profitable.

Everyone is screaming for Hashrate/Watts and Hashrate per USD, but you if you want to scale big, these are not the only things to take care of...

BTW: some offtopic... how long does it take to not be a newbie anymore? I already get some pms and can only response every 6 minutes, which is very annoying...

In your own comparison the S4+ is lower $/GH and W/GH, with your only gripe being you can't put 77Kw in a single rack. In what sort of facility are you going to be limited on foot print before 77KW per rack?

Why not? If you want to put such gear in a datacenter, you wont rent rackspace..

But yes, 77kw is a lot and you might won't fill that rack completely.

It's a awful lot of PDU's in one rackspace.  And a lot of electricity.   A lot of the "asic" data centers are shelves so does not really matter.

I think very few overall are put in traditional data centers. 

I'll fill a rack with s4+ and see how it goes :)

I will do the same as you, we will publish results soon :)

I have 5x S4+ here and one won't turn on. Will I void the warranty if I open it up? Email already sent to support@bitmaintech.com Thanks

Not unless you damage something, just be careful and slow.

You are an official agent of Bitmain and can speak on their behalf? Thanks

I can't bind Bitmain, but I'll do my best to help you out should anything go wrong.

Opened it up and nothing looks loose or broken inside. Any suggestions?

If absolutely nothing is happening then its power related. That can be short protection kicked in, undervolt protection (not it) or something else. Have a look about for any small bits of heatsink that may have come off during shipping, and if you can give the case a shake to check for any noise. Then it'd be on to opening up the PSU, but that is NOT something recommended as its dangerous.

Don't hear or see any loose pieces. All connectors are connected.

What does the multi meter say for power coming out the wall?

Contact the Zendesk to arrange a replacement then: bitmain.zendesk.com

This was a PSU issue. Bitmain is arranging a replacement PSU. Thanks for your help.

Hi guys

I got 3 more S4+ devices so I decided to put them into a rack.. Unfortunately I wasn't able to put them in a rack, they just didn't really fit so I gave up after 5 minutes... the brackets don't really fit and the screws are too long, so it's a bit annoying. However, I decided to put them into the rack, without mounting them.. I just put a floor panel from our datacenter at the bottom of the rack so I could stack the miners on top of it...

One of them makes fancy noises, must be a fan, I remember Dogie wrote somewhere that he had such a noise, too. Some more miners will arrive next week.. :)


https://i.imgur.com/tFFVPU2.jpg

https://i.imgur.com/61H7bB2.jpg

https://i.imgur.com/riKBFGL.jpg

Regards
supertee

My money would be on one of the fans being ever so slightly misbalanced, which at those RPMs generates some exotic sounding vibrations. I had it on my S4, not much you can do other than add in rubber isolation pad.

Hello , I bought some antminer s4 + and have the problem, connect and alcabo 30 minutes the temperature reaches 90 degrees and stops for safety. the equipment is brand new and will work all the fans, I need please help me ...

What is your ambient temperature like? Are all blades getting this hot or one specific blade? To hit 90 is not really good.   Is it overclocked heavily?

What pool is it connected to just out of curiosity?

the ambient temperature is 32 degrees, is working with other antminer s4 that go great temperature 52 degrees , this is new s4 + bitmain purchased directly from ... I can not do.

32C should be fine, mine is running in much hotter than that. Do you have sufficient space either side for airflow? Its not receiving hot air from other miners is it?

It has enough space also she is in the top of the tower where it should have better temperature .... as if the team I made ​​him overclocked ..

Can you show us a picture of your rack please?

Dogie... I got my Water Cooling Block last night and set up! :)

And I think I'm in love... Everything is running at 45C... that's a Whole ~20-25C drop in over all temp......

Pics to follow this weekend.

And We can all start talking about how to get them to all of you that want/need them.

Nice to see a bigger unit come about however that power ratio in UK would not even RIO on machine from generation of coins minted to cost of about £0.14 per KWH With the massive spikes in diff and no doubt bigger spikes when these units are about and online it will kill any profit made from them. If the power was half the use of what it is now and having to use a 1600w psu  and reduced down to 700 would be a massive improvement. Think going to wait for next gen of  chips to come out for that to happen.

OK, I am starting to get irked by Bitmain's customer service. I reported the problem to them 12 days ago. First they asked me to take pictures of the inside, I did. Then they asked me to do all the diagnostic work by taking the miner apart and using a different PSU to power it, I did. Then they asked me for pictures of inside the defective PSU, I sent them. They tell me to wait patiently 4 days ago for a replacement PSU, still nothing shipped. Just now they asked me to send the defective PSU to China out of my own pocket. How can I get this taken care of?

Has your shipment made it to their address yet?  I imagine they will look at it and make sure you shipped a PSU before they send out on their side.  Also it's weekend so I woulld give it a few day now (And yes I understand that is not fun as a miner).

Next week give them another email if they don't ship it out asking status.  And if you really have problem they have US and China support that you can call and talk to someone.

Question for bitmain if in here. Are you going to be looking to do Scrypt miners or other algos like on the scrypt miner you had with the C1 any news or upates regarding if going to be venturing into others?

I think it's a pretty safe bet to say no.  They did a lot of work into looking into it before and thought it was not going to work out.  At one time I had 2 ordered I think of the L1's and they ended up canceling everyone's orders and giving money back plus a few percent I think.   

But alt market game is tough I really doubt they go over to it especially after the L1 stuff.

Your power costs are insane, I'm paying £0.089 inc tax.

Two issues with my new s4+ so far:

1) Mining on westhash has locked the box up twice within two hours of mining.  Moving it to kano.is or btcguild.com, no lockups.
2) The screws that come with the s4+ are too big to allow you to mount it in a 19" rack.  Really?  I spend 1000 bucks for something I can't even rack mount because its got the wrong screws?

The screw thing is beyond annoying :p

Nicehash does not use a regular stratum server.  I don't think smit has made a unofficial firmware for S4+ for it but I cold be wrong.

The other pools dont require the patch so they run better then nicehash does.

Yeah, I don't mind really, I can just on one of the bigger pools until/if smit does an s4+ firmware. :)

same thing here, not rackmountable, very annoying..

I'm very surprised that they are not rack mountable they had been following that on regular S4's.   But I guess a lot of asic data centers use shelves and not racks.

So maybe they had asic data centers in mind?

I'm going to find some flat headed screws tomorrow and take care of that, it doesn't need much in the way of clearance.

Will let you know what I source.

They sell it as rackmountable device, which it is not... so it is no excuse that you usually have it on a shelve.... :)


May it is enough if you leave away the ring washer, I didn't try that and just put them in the rack, as in my pictures above.

Well, it happened! All of my S4+ (6 in total) have been hijacked...

https://i.imgur.com/MKLHdlL.png (https://i.imgur.com/MKLHdlL.png)

I have different passwords for each device, and they are bulletproof... I've read some posts here and it seems that the developers of cgminer have reported that this will happend to bitmaintech but they didn't care... Even KNC Miner Neptune can restrict access to specific IPs... Seems like the only solution is to put the devices behind a firewall, which is a bit annoying, as the solution would be so easy!

Why can I not access the device by ssh and adjust cgminer api? It keeps telling me access denied (on all devices), altough password is correct for sure... Is there some kinda default user/password for ssh?

Thanks for your help

Profitable.....

https://www.nicehash.com/?p=miners&a=1&addr=1NH8i5MPB16K57fNLXeeffBXD3mHhufviR

This would be very scary.   Is your miners in a data center with other?  Or are you hosting at your house?

Anyways wish you best of luck stopping it.  If home I would see about locking down your router.   Start there for security.
 

spending 15min looking at this I am going to assume datacenter, or like a college network, and I think I've figured out how to do this via the network. Its kind of scary the security gaps in bitmains gear

so without logging in I can send via the network /etc/init.d/cgminer restart  .........  sooo that stands to reason...

You could just scan your local network and see all the other bitmain gear then....set them to work for you.

First thing I did was put an ACL on the switch my bitmain gear is connected to cutting off all traffic other than outbound or management from my workstation.

There was a thread about this months and months ago or maybe in the product thread for the s4 or s5?

Hello!

Part of my s4 models were rock mounted , but after Recieved sp35 I have put them instead because they are thinner. No trouble rock mounting the S4 model, they had in the set the mounting ears. Isn't the s4+ with the same dimensions as s4?

Also sorry for your troubles with the high jacked devices. I thought there is a reset button on the front that resets passwords to root.

I also wrote you a PM..check it out!

I have them in my datacenter, directly attached to the internet for testing purposes. Of course it is an easy thing to put them behind a firewall, but this should not be possible... However, I reset them, changed the IPs, changed the ssh password and will put the behind a firewall as soon as I am back at the datacenter. :)

But it seems to be very easy to get hashpower from bitmain products without buying bitmain products...  ;D ;D

I rather wonder how they got my ips?  ???

One might assume by the type of traffic, or it could be someone in the datacenter

There is no access to that part of the datacenter and nobody can see the traffic... might a pool got hacked or something like that?

There should be no access in data center but things can happen that should not. I suggest looking into the center. 

What pool were you using?   We can tell more about pool troubles knowing it.

It is my datacenter, I know that it is in a room where nobody has access.  ;)

I was on bitminter and kano with the devices.

I don't believe either of those have been hacked, at least not that I know about. And with them changing pool makes me think someone accessing machine, as if they had the pool they would still let the miners all mine to it and take the block rewards.

I highly suggest looking at your security logs to see if outside IP was connected during time range it switched.  I don't mean physical access but remote via internet.

I have some on a IP and they have never been hacked (i have hardened my router to help).  But if you look at security breaches things that should not happen, does not mean it cannot happen.

I attached them directly to the internet, too lazy to set something up for my testrun. ;D

Check your Logs, see where the change came from, also update your passwords.

From what I understand its a flaw in the bitmain system. And people could just be scanning for devices. Its not hard to scan a full subnet for a device that reports it's self as Antminer, then launch a relatively non-sophisticated attack.

This was looked at previously. It requires publicly accessible IP addresses which co-locations often use. Secure your gear behind a firewall.

This would explain it.  It's not just about physical access.  If your putting any device miner or other put up a firewall unless for some reason you cannot have it.

Now that they have seen those IP's you for sure need to change them from test run to regular behind router and possibly other equipment if it's a true data center.

Yep. They'll have added those IPs to the script they use so regardless of how many times you reset it, the script will still change it back when it runs. It may even be entirely operated, just scouting around for open IPs and hardware.

So I've placed them behind a small firewall and opened port 3333, nothing arriving at the pool, but I can ping the pool main ip from the device. Do I need to setup NAT for this?
Would be so much easier with an IP restriction....

You don't need inbound NAT, and you don't need to open port 3333 inbound, as long as the box can reach the internet and make a TCP connection is should be fine.

another reset did it... :)

Glad you got it working!  I was working on post and hit post... and you had it fixed already.   Which is a good thing :).

A simple reset can do amazing things sometimes. 

Yes, but as a former software developer I must say I am not too amused about that firmware... Actually I would say we would have been directly fired, if we delievered such issues... :)

Why? If I leave my Windows based PC on a publicly visible IP, its going to get attacked like hell yet its not Microsoft's fault. Its no different here, if you put yourself at risk eventually someone nefarious will find you.

Hello,

I have an S4 7 months old and power supply gave in already, just wanna know if it is still covered for warranty and how will be the process of returning or is there someone in charge with regards to warranty.

Thanks & best regards

kae1078

No warranty after 90 days.

In that case will I be able to purchase from them?

You can purchase an alternative one on their site, but you'll have to check that you have a PCI-E version of the S4. If you have the type with spade connectors you'll have to ask Bitmain if they have spares of another PSU.

I have the spades, that's the problem.  :-\

I send bitmain tech an email already and they told me that they reply soon regarding the PSU.

Okay. Worst comes to the worst you may have to make your own cables with something like a DPS-2000. Get some nice 12AWG cables, a crimper and some space connections and you'd be good to go.

 I'm interested to your suggestion but I have no idea on how to do it, if you can help me or show me how to do it.

DPS2000 + breakout board that converts gold finger to cables = https://bitcointalk.org/index.php?topic=637595.0
Get some 12 AWG wiring online + spade connectors. You could even cut them off the current PSU if you were desperate.
+Get some 40-60mm fans to cool the PSU, they don't come with them.

i just received 3 units, i had ordered from DHgate.  in the process of testing them, i found out that the problem with them is due to a factory default cgminer setting "api-allow" that is set to accept commands from "W:0/0".  what i did is i ssh'd in and manually configured the setting to "W:127.0.0.1,W:192.168.1.0/24".  i wasn't sure which of the files were responsible, so i changed all that i can find, in /etc and /config. this is also a good time to change queue to 1 instead of the factory 8192.

2 of the s4+'s are exhibiting hotter temperature, 6C hotter than yours.  the one normal acting one is at 70C/71C, which i'm not worried about.  i am in contact with bitmain support about this and hopefully they can help me resolve this problem.  i'm squeamish about opening them up and readjusting heatsink/reapplying thermal paste, hopefully i can get RMA units sent to me instead.  

also, has anyone updated their firmware to s4p_20150518?  after updating the option to halt units at 80C has been changed to 95C!  i think this is a bit dangerous as i'm concerned about other components in the unit being able to operate safely at this kind of heat level. anyone care to chime in on this?

https://i.imgur.com/BGGU8pn.png

The limit already was 95C (as it should be, these chips are resilient), the text was incorrect before.

i'm sure the chips themselves are, not too worried about those, but what about other components on the board? wiring?

Specified appropriately.

emailed Bitmain tech support and gotten the following response:

 Bitmain (Bitmain_D)

Jul 3, 14:22

Hello sir,
first of all your room temperature is a really high.

can you lower it to 25C?

since any unit that you have will die on 32c.
no matter how ventilated area is.

i would not suggest you units to go over 65C.

and if it is possible, just to extend their lives, can you turn them off for 2 hours during hottest time of day?
they will last longer.

we do not see a reason for replacing working units.


best regards,
Bitmain_Z

It contains wrong information unfortunately. Some of the support staff are very good, others it seems don't have much actual mining experience.

Most commercial farms will run between 30 and 35C ambient and I've done very extended tests on all Bitmain equipment at 40-45C. Only the S4+ doesn't like those temps but its still within specifications. 65C is on the cool side for an S4+ and they're specified for 90+.

sure, whatever floats your boat i guess.  i on the other hand don't like replacing dead psu's or the risk of fire hazards.

I just wanted to give little positive feedback .

I ordered 2 x S4+ on Friday 3rd at 16:00 Hrs.. I paid 8.053 BTC in total including UPS shipping to the UK.
They've arrived this afternoon at noon on the 8th .. Very impressed with payment to mining time.

Straight out of the box, plugged the 1st unit in, configured a new password and it's up and running at 2,582 . I guess most importantly all the ASIC chips read 'o' so nothings broken on arrival ..

So far so good.. Time to get the 2nd miner out.

Only thing that made me raise an eyebrow was that out of the box they're configure to start mining in the antpool for them.. While i was getting sorted i heard the miner fire up . I do wonder how many units are out there in default config mining for them.

All of bitmain's hardware comes configured with their pool info, mining for them. If your first unit didn't, it was the exception the the rule.

Hi all,

I understand the S4+ has some power mods to make it more power efficient than a S4. I was wondering if anyone can tell me about the freq settings in the S4+

---------------------------------------------------------------------

So in the S4 main freq settings i use are

100 = 1000gh at unsure power after removal of underclocking..

125 = 1250gh --- u get the picture

150 = 1500gh --- u get the picture

175 = 1750gh ---u get the picture

200 = 2000gh @ 1440w

---------------------------------------------------------------------

Can someone tell me how many chips are in the S4+, what the stock freq is for 2570gh @ 1480w & what other freqs are available & has under / over volting been removed?

-----------------------------------------------------------------------------------------

My ultimate goal here is to work out what the lowest clock & volt are @ how many watts at the wall & if the S4 & the S4+ are essentially the same unit with exceptions on the power supply, how many chips are in the unit & stock voltage, What we & BITMAIN can do to translate these settings over to the S4 so we can give this puppy a bit more life...

------------------------------------------------------------------------------------------------------

On a side note - what are the differences in the firmwares for the S4 & S4+??

And (Beware this is not a dare) has anyone tried (Or mistakenly) installed the S4+ firmware on an S4 & if so what was the outcome (Good or bad?)

-----------------------------------------------------------------------

On another really side note does anyone know Smit who did the fan mod for the S4 in the begining?? Maybe he could answer a few of the questions i posed here??

It makes sense, removes a potential variable if something isn't working. I leave my miner details when I send anyone hardware, so 1) I know when the hardware was turned on, 2) that I know it works on arrival and 3) so the customer knows its good.

See the S4+ guide in my sig or #2 post in this thread, there is a full frequency, hash rate, power consumption and temperature graph.

And price was raised: Price:       1170 USD ( 3.927 BTC )

I hope they are speculating BTC will continue to rise with this.  Who knows.

*Also I should say for lack of a better term "I have no dog in this fight".  I'm not here to lecture Bitmain on how to price items, or start argument.  Just stating how it did go up to document price as of right now.

I do too. When I see a blip on nicehash, I know everything's OK.

I do aswell, part of it is I hope they pick same pools as I know it's configured right as far as url and port.  One of the biggest things I do is make sure to include IP address on a piece of paper when I sell a piece of gear.   

I write a little quick start guide and it almost always saved me from having to mess around with helping set it up.   I only had once with a completely new miner that I had to put in a hour or so to get it to work on their network.

Just set the rig to DHCP before shipping out. If they're too dumb to get it going, I probably won't waste my time helping them.

So just a quick rant - I bought 6 antminer s4+  on release day.  I bought 2 more a few weeks later.  I am having an issue with one of them, so I did the usual thing and sent Bitmain an email.  One board is not hashing - all x's and it crashes all the time...

I just received an email from Bitmain saying - check all the connections...but if its a hash board they are only 30 day warranty!!!  WTF???  When did that change?  All the s4's I bought - yes A LOT!  All had at least 90 day warranty.  So I am writing to let everyone know of this NEW running change with no notification *(at least that I was aware of)  So if you are on the fence if you should buy this one or another one.  Make sure you know the warranty before!  It's honestly a shame - as they took great care of me with the s4's and s5's previously!

Rant over...

AJ702 ??? ???

Might respond with their warranty info that is still up: https://bitmain.zendesk.com/hc/en-us/articles/202661989-Limited-90-Day-Warranty-Terms-

No where does it mention hashing boards are 30 day's.  I have never heard this before.  If they changed it to 30 day's on hashing boards the 90 day's not near what it was guess PSU, and controller.  But huge difference.

Your mad and rightfully if enough of you are facing the same thing try to get a class action lawsuit going because that is definitely grounds for something like that. here check this out. http://www.classaction.org/list-of-lawsuits (http://www.classaction.org/list-of-lawsuits)

If they changed the warranty, first they have to publish the new conditions somewhere and then apply the modifications to units bought after the date of the change, not retroactively apply them to the ones bought before they changed it.  Well, that's what I think.  :-/

Thanks for pointing that out.

Yeah - I'm not happy to say the least...I also know that some negative publicity might sway their attitude a little bit.  I am still shocked!
It's at a data center so I haven't even had time to go an trouble shoot it.  It might even be their new "bulletproof" power supply.


I will keep you posted!

AJ

God fucking damnit BITMAIN, you removed frequency control  over 200MHz with the latest firmware updates, now I'm stuck with only 200MHz since there is no way to flash the original firmware back to the miner. Why the fuck aren't these kind of changes detailed in the change logs?!

What a great follow up to the S4 where they decided to remove voltage control.  ::)

BITMAIN, PLEASE make the original firmware available for download so I can revert, or bring frequency control back to the newer firmware.

To the person above me;

I think you need to realise that backups are essential.
Especially with, what is estimate is to be, ones of small sizes.
Not that those are more important then bigger ones, just easyer.
You learned your lesson, it will come back no worries.
If not you will find a backup of someone who did backup, if you are a bit lucky.

While I agree that backups are important in life, this has nothing to do with backups. This has everything to do with BITMAIN removing functionality from it's hardware again. It'd worse this time around, though, since I can't flash back to the previous version.

Do you have .img with older firmware to burn on to microsd? If not I will provide with the link...

I've tried the April 2nd images here: https://bitmain.zendesk.com/hc/en-us/articles/205145945-S4-Firmware

But they've been updated to July 15th firmware. The link descriptions are wrong, unfortunately. If you (or anyone) have a copy of the actual April 2nd image, I'd greatly appreciate it!!

I see...

Here is complete .img file that you will need to burn directly to microSD

https://mega.co.nz/#!o19WABbB!UkyQEKz9_h2kopxtS74CO_hiaA6t_x6eji497BnIfG4

It is based on 04022015 firmware...

You got that link from zendesk that I linked, no? I've tried that image file, it's been updated to July 15th. I know the description says April 2nd and so does the file name, but booting off of the SD card reveals the image to be the latest July 15th firmware unfortunately.

No that is not from bitmain zendesk... that is image that I made personally, also if you look you will see that my image has .img extension where as on zendesk is .imgc

This is your download link: https://mega.co.nz/#!o19WABbB!UkyQEKz9_h2kopxtS74CO_hiaA6t_x6eji497BnIfG4

And the link on zendesk   : https://mega.co.nz/#!o19WABbB!UkyQEKz9_h2kopxtS74CO_hiaA6t_x6eji497BnIfG4

Same link.. I guess they took your link and posted it there. I don't understand why I'm getting "File System Version   Wed Jul 15 16:17:04 CST 2015" when I boot off of it. Maybe the controller card's firmware is overriding it? It is definitely booting off of it though because my pool settings are gone and back to bitmain's default when the SD card is installed. Weird...

Thanks for trying to help, I appreciate it.

Yup you are right I totally dismissed first link on zendesk, they are the same. Well I tried to help you out you are a fellow miner :)
As for my image I know for sure that it was made with first version of firmware which you would have from first batches of the device.
Definitely weird behavior on your device...

Hoping someone can help me out here.....

I plug in the machine, the PSU fan spins, but the main fans and ethernet port never come on.

Has anyone else experienced this?  Is there a solution? 

Either your mains voltage isnt ~190V+, PSU is in overheat protection mode or there's an internal short. 1. and 2. are easy to check, 3. requires opening up the case and doing a visual inspection.

my voltage is 205v+, so I know it is not that.

Why would the PSU be in protection mode on a brand new machine, just out of box?

What should I look for inside?.....I did open one, and nothing looked amiss. 

Pieces of metal floating about on the hashing boards would cause it, can be diagnosed by giving the thing a good shake / turning over and listening. Check if any of the PSU cables appea to be cut / damaged, or anything on the terminals of the PSU appearing to be short.

Good afternoon friends Bitmain, acquired with you within 3 months one Antminer S4 +, two days ago, the antminer starr but not stable, and after 1 hour, or turned on or off with low hashing. which could be the problem? the PSU?

Anyone know what a solid green light on the machine indicates?

I have a problem with my S4 + , as I can fix it?  ???

http://imageshack.com/a/img661/1783/5I4Qsr.jpg

Can you tell us more.  Did you get it like that?  Did it just start like that?

We need a lot more info.   Just one picture is hard to help on.

Unplug and restart the system, mine acted like that once and it solved the problem.

The s4 + Bitmain buy direct , but I get hit all the bases and holding up cards because loose bolts were broken .
I could weld screws and assemble the s4 + and put it to work full functioned 4 cards, but the restart because the electricity went only worked three cards and turned it off and turn and only 2 cards this time work.

They have not sold for a bit on direct I don't think on S4+.   Are you just getting it and saying direct?

Also you might show pictures of the "weld screws".

Also you might show pictures of the "weld screws"

http://imageshack.com/a/img909/7851/dEW4uI.jpg

http://imageshack.com/a/img538/2946/kuPE0Y.jpg

Are you saying you recently bought it you said "The s4 + Bitmain buy direct , but I get hit all the bases and holding up cards because loose bolts were broken".  If those needed welded it would take one heck of a hit.

I'm confused if it's something you have had or a new miner to you?

These s4 + I buy  direct from Bitmain is more , I give eight coupons of S7 in this forum here .

The fault was the safest shipping company .

I did not think they sold these in a while on main site.  If you truly just got from bitmain I would contact them for warranty.  But I'm guessing you have had them and there is a miss communication.

I think there might be a language barrier.  Are you saying you just received this miner from bitmain?  Or saying you have been running it a while?

Thank you very much for your interest , but I only want the solution to the problem of the 2 cards that do not work
Dealing with Bitmain has always been excellent but think about spending more time sending undermined me not to my liking.

You need to tell details still.  Is this something the miner has always done?  

Or is it new for it to do?  Or a new miner for you completly?

I'm asking as breaking those bolts is not normal.  And trying to understand timeline.

Anyone know how to restore overclocking to the S4+?

Never mind, figured it out myself.

https://i.imgur.com/mdgFtd3.png

https://i.imgur.com/729HAX5.png

Just need to edit cgminer.conf

Does anyone here know the exact voltage that these chips operate at?

I know the voltage is fixed and can't be changed but what is the exact operating voltage for each ASIC?

I am new to bit mining and I have been having a problem getting my miner to connect to my router via Ethernet in order to find the miners IP address and I have already gone through quite a few guides and forums to try to diagnose the problem and fix it. However all have failed to fix or find the problem and it appears to me that the problem is with in the miner. A blue light on the beaglebone lights up, but when I connect the ethernet cable to port neither the yellow or green light come, which makes me think that there is problem with the beaglebone. Any suggestion on what the problem is and how to fix it?

from my research they use the same chip (BM1382) in both the s4 and s4+ and the specs are as follows
Chip specs: BM1382

Process Node: 28nm
Package Type: FCQFN-56
Packaged Chip Size: 8mm x 8mm
Number of Cores: 63
Core Voltage: 0.75 V
Core Frequency: 250 MHz
Hash Rate: 15.75 GH/s
Power Consumption: 0.59 J/GH (chip level, and it can be lower to 0.40J/GH by lowering the core voltage)

sources:
https://www.cryptocoinsnews.com/bitmain-antminer-s4-review-2ths-bitcoin-asic-miner-psu-replacement/
 DO NOT POST SESC LINKS

I hope that helps

Hey guys just bought an s4+ that was used. trying to figure out an issue with it before asking for a partial refund. Currently one of the boards, does not raise in temperature. and the unit is underhashing. but the chips show as ooooo in the chain. any ideas?


EDIT:
they show as o in the chain, until about 10 minutes in then all but one switch to x.
sometimes when the s4+ is turned on chain 2 shows 27 asics instead of 51.
And there is no orange light on the board like the other 3.
faulty board?

Wonder if a bad S4+ hashboard could be replaced with an S4.
They both use the same chips, just a different amount on the board.

Anyone think this would work?

old.....

all thanks for the discussion