ANTMINER S4 Discussion and Support Thread

[AlittleBitMore]

anyone know where to get fan. Bitmain refuses to send one unless I buy another unit (hostage).
I tried a Delta 120 mm 5500 RPM PWM TFC1212DE but it slows down as the others speed up??



AntMiner
Chain#
ASIC#
Frequency
Temp
ASIC status
1
40
200
42
oooooooo oooooooo oooooooo oooooooo oooooooo
2
40
200
41
oooooooo oooooooo oooooooo oooooooo oooooooo
3
40
200
43
oooooooo oooooooo oooooooo oooooooo oooooooo
4
40
200
45
oooooooo oooooooo oooooooo oooooooo oooooooo
Fan#
Fan1
Fan2
Fan3
Fan4
Speed (r/min)
3,360
3,360
2,760
3,240

Besides terrible customer service, this S4 is a major screw up. I havew other problems but one at a time. Right now I need to get a Fan.,

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[vegasguy]

guys Im trying to manually set the difficuly on my S4 (with lastest firmware) for P2pool. Im not sure but I think the difficulty should be 2048. On my S1 I used to add a +0.01 after my wallet id , but I dont remember what it was, and that number has changed now. Im trying to use a multipool and my speed is thrashing around alot. Using this setting seemed to help on my S1. Any advise? Thanks in advance.

Vegas

[dogie]

BitmainTech don't love me as much as some of you. I only got 1 C1, 1 S3+ and 3 S4 coupons. I am wanting to give the C1 and S4 coupons to someone who can use them. All I ask for is a donation to help me buy my S3+ as I am 0.3 BTC short for the pair. Please PM me if you would like one or all of them and the amount you are willing to donate.

I also want to make a note on here about BitmainTech giving me the run around for a power lead. I asked them about the 16A lead and told them I was on a 240V power system. After a couple of emails with BitmainTech they were still amendment that I needed a 16A lead and told me to find one online, which I couldn't because the C13 connector is only rated for 10A@250V. After a couple of emails with BitmainTech I gave up speaking with them and spoke with my electrician to see if he could get me the lead BitmainTech was talking about. He told me that the BitmainTech customer support staff don't know what they are talking about and that the 10A lead would fine to use. I then asked BitmainTech to confirm this with someone there that knows about power usage. Surprisingly this time they came back with a different response and told me that the info the electrician gave me was correct. I asked them to update their info on their website for other people on 220-240V so it is not confusing but they have not done so.

So the rule is -
120V needs 16A
240V only needs the standard 10A

I also have some hashing issue with my S4 but I will post that another time. It's too late and I need some sleep.

Its worth reminding people that even on 240V your cable MUST be fused @ 13A (UK), not the cheaper 5A.

[dogie]

anyone know where to get fan. Bitmain refuses to send one unless I buy another unit (hostage).
I tried a Delta 120 mm 5500 RPM PWM TFC1212DE but it slows down as the others speed up??

Besides terrible customer service, this S4 is a major screw up. I havew other problems but one at a time. Right now I need to get a Fan.,

Sounds like the PWM signals are reversed, ie high is low, low is high between the two fans. Either way it doesn't matter, you're temps are so low that its overcooled if anything.

[sEpuLchEr]

Sounds like the PWM signals are reversed, ie high is low, low is high between the two fans. Either way it doesn't matter, you're temps are so low that its overcooled if anything.

Actually, I think it's more due to the Delta being rated at about 2 x watt and amp usage than the stock S4 fan.

[dogie]

Sounds like the PWM signals are reversed, ie high is low, low is high between the two fans. Either way it doesn't matter, you're temps are so low that its overcooled if anything.

Actually, I think it's more due to the Delta being rated at about 2 x watt and amp usage than the stock S4 fan.

Could be. Although why does it get slower and not just sit at its max current draw?

[sEpuLchEr]

Could be. Although why does it get slower and not just sit at its max current draw?

Hmm.. not sure. Maybe the boards can't provide the power the delta needs to run? The stock fans are pulling 27.6W per fan. The delta pulls about 50+. With the stock fans, it's already reaching max cap of the psu. I tried overvolting the chips by just a tiny bit and the boards won't even start. LOL.

But then again, you may be right.

Also, if ASIC chips works the way like CPU chips, they need to run at a certain temp to be optimum. Overcooling chips does not make better hashrates.. just my opinion. I may be wrong.

Wait.. I'm always wrong until proven right...

[dcweb]

guys Im trying to manually set the difficuly on my S4 (with lastest firmware) for P2pool. Im not sure but I think the difficulty should be 2048. On my S1 I used to add a +0.01 after my wallet id , but I dont remember what it was, and that number has changed now. Im trying to use a multipool and my speed is thrashing around alot. Using this setting seemed to help on my S1. Any advise? Thanks in advance.

Vegas

This is what I wanted to speak about earlier but needed sleep first... But just quickly, I have found +1436 to work best for me and I get just over 1900 ghs. Setting it to +1500 would cause it to mine slower (around 1600 to 1700 ghs) and chips would start to fail after an hour.

I am running the latest firmware and the miner is located in a shopping centre (air conditioned to an ambient 24C) with board temps of 50, 50, 46, 46.

I am running my own P2Pool node since there are only a couple in Australia and their latency was bad for me. Even with my miners being in a separate location to my p2pool node my ping between the 2 locations is on average 14.6ms.

Do I need to make any changes to the p2pool node config, install ck's latest cgminer, or edit the antminer conf to get to the advertised "guaranteed" speed of 2TH?

I have 2 S1's that work flawlessly at their advertised speed so I expected the same company to keep the same standards.

[Cassey]

Just received my S4, ordered on the 14th, paid with bitcoin, received in the mid-west USA on the 18th.

First impression:  My God its LOUD!

Startup:  Seemless.  Plugged it into a waiting 220V 30amp power strip and it came right up, connected to my DHCP subnet (10.x) and responded to my web-browser.  Off and hashing on my chosen pool in minutes.

Questions:

1)  Presume running at stock 200Mhs is a reasonable balance of speed vs. power (and obviously is within warranty)
2)  Running 3.4.3.0 hardware and 4.6.1 cgminer.  Is this the latest?  If not, where do I download new code from?

3)  Any sound-proofing ideas that won't impact cooling?  System is rack mounted.

Thanks!

Cassey

[sEpuLchEr]

Just received my S4, ordered on the 14th, paid with bitcoin, received in the mid-west USA on the 18th.

First impression:  My God its LOUD!

Startup:  Seemless.  Plugged it into a waiting 220V 30amp power strip and it came right up, connected to my DHCP subnet (10.x) and responded to my web-browser.  Off and hashing on my chosen pool in minutes.

Questions:

1)  Presume running at stock 200Mhs is a reasonable balance of speed vs. power (and obviously is within warranty)
2)  Running 3.4.3.0 hardware and 4.6.1 cgminer.  Is this the latest?  If not, where do I download new code from?

3)  Any sound-proofing ideas that won't impact cooling?  System is rack mounted.

Thanks!

Cassey

Yes... they are loud. I got a shock when I first turn it on.

Looks like most of us are running 225mhz with no problems. Should get you around 2.2t with that.

As for the firmware, look at the date, the latest is 16th oct and can be found at bitmain's site. https://bitmaintech.com/support.htm?pid=00720140930114518599JXGHWWD80660

[Cassey]

Thanks - looks like I'm one rev out of date.  Pulling now.

Running at 100mh and find the noise tollerable, scared to think of what 225 would generate.  Really need to figure out some sound deadening approach around my rack.

[pikachuy]

Yes... they are loud. I got a shock when I first turn it on.

Looks like most of us are running 225mhz with no problems. Should get you around 2.2t with that.

As for the firmware, look at the date, the latest is 16th oct and can be found at bitmain's site. https://bitmaintech.com/support.htm?pid=00720140930114518599JXGHWWD80660

Well, on mine, running at 225mhz for awhile eventually gave me some X's and O's and I had to hard reboot it manually, for a true 24/7 with no maintenance and power efficiency, i recommend running it at stock settings.

Has anyone done a power test comparing running 24/7 at 200mhz and running 24/7 at 225mhz? I wonder if it's even worth it with the power increase.

[MrGreenHat]

Yes... they are loud. I got a shock when I first turn it on.

Looks like most of us are running 225mhz with no problems. Should get you around 2.2t with that.

As for the firmware, look at the date, the latest is 16th oct and can be found at bitmain's site. https://bitmaintech.com/support.htm?pid=00720140930114518599JXGHWWD80660

Well, on mine, running at 225mhz for awhile eventually gave me some X's and O's and I had to hard reboot it manually, for a true 24/7 with no maintenance and power efficiency, i recommend running it at stock settings.

Has anyone done a power test comparing running 24/7 at 200mhz and running 24/7 at 225mhz? I wonder if it's even worth it with the power increase.

I had a similar experience when I played around with the frequency, but I assumed it was because I didn't change the voltage. Is there some kind of formula for how one should change the voltage if you change the freq? But yeah, I was able to mine at like 2.2 TH/s at 225 for a few hours, but the PSU couldn't handle it and it powered itself off, and I need a stable 24/7 operation, which 200 MHz seems to provide. Even the slightest adjustment seems to alter its stability, so I have basically decided to keep it at 200.

[sEpuLchEr]

I had a similar experience when I played around with the frequency, but I assumed it was because I didn't change the voltage. Is there some kind of formula for how one should change the voltage if you change the freq? But yeah, I was able to mine at like 2.2 TH/s at 225 for a few hours, but the PSU couldn't handle it and it powered itself off, and I need a stable 24/7 operation, which 200 MHz seems to provide. Even the slightest adjustment seems to alter its stability, so I have basically decided to keep it at 200.
[/quote]

Is your voltage set at 0.72 or 0.725. Mine came to me with 200mhz and 0.725. But as I'm in Singapore, we are running 220-240v so the A draw is much less. The X's comes one once in a while whether it's at 200 or 225. And if you're running this on multipool, good luck. You'll start getting Xs when they start switching pools. I was just playing around to see how it works. lol.

[Cassey]

Running on www.multicoinpool.org in their profit switching pool.  So far, so good.   The sysop is setting up a high diff queue as we speak to help optimize for S3s and S4s.

[sEpuLchEr]

Oh, and there is some kind of fomula if you read the chips specs.

https://bitmaintech.com/support.htm?pid=007201406210452505098o0UWHKV0661

[Cassey]

Wow! 

http://puu.sh/cWvE3/072f5ed8f1.png

Stock is 0.72V, at 0.85V the chip is pulling more than double the power for a 22% increase in performance.  Presuming the GH/s is based on clock rate, that would be:

0.75V at 222MH
0.80V at 244MH
and 0.85V presumably to add stability at the same 244MH, but at a 30% bump in power for that stability.

[Cyper_BLC]

Wow! 

http://puu.sh/cWvE3/072f5ed8f1.png

Stock is 0.72V, at 0.85V the chip is pulling more than double the power for a 22% increase in performance.  Presuming the GH/s is based on clock rate, that would be:

0.75V at 222MH
0.80V at 244MH
and 0.85V presumably to add stability at the same 244MH, but at a 30% bump in power for that stability.

you cant achieve 0.8V. S4's hardware voltage top limit is 0.75V

[Cassey]

Ok - was just reading from the previous posted chip spec.

[sEpuLchEr]

you cant achieve 0.8V. S4's hardware voltage top limit is 0.75V

The PSU that comes with it cannot support 0.75V. I tried. LOL. Hash board won't power up and you can literally hear the PSU trying... but running like a toy rabbit that is out of juice.