ANTMINER S2 Discussion and Support Thread

[xzempt]

guess its about time to bite the bullet and buy an s2...

[bspurloc]

How are the 10 boards powered from the power supply? 10 atx wires? (oh 6 atx to power board) 3 per 750 power supply then!
Wouldn't it be cheaper and more efficient using 2 750watt supplies? of course one would be outside the case.

I would think as we phase out the S1's those left over 750's would power these easily.

anyhow that is what I would do instead of running a power supply at 100% 24/7/3.
   3 being for 3 months when it fries itself.. haha.
even 2 600's or 650's.

[samsonn25]

Two high quality 660 platinum are enough to push 1400 watts easily.  Sea sonics can he had after rebate for $80 every few months.

[smn68]

I have 4 batch 4 S2's that max out at 1100 then drop down to 800-900 then back up to 1100 constantly, never a stable rate.

I tried spreading the load out over 2 power supplies today but it made no difference [1 seasonic 1000w and the  S2 enermax 1000w]

[mdude77]

I have 4 batch 4 S2's that max out at 1100 then drop down to 800-900 then back up to 1100 constantly, never a stable rate.

I tried spreading the load out over 2 power supplies today but it made no difference [1 seasonic 1000w and the  S2 enermax 1000w]

They seem to be picky about pools.

My S2s run like champs on Eligius.

On BTCGuild, one had 36% "bad", mostly "unknown".  The other was 1% bad.

On p2pool, they run around 920-930gh/s, and more than once I've had errors appear (x's or dashes) as soon as I point it to p2pool.

M

[s1gs3gv]

The SP10 is such a crappy deal compared to the Antminer S2

[nottm28]

The SP10 is such a crappy deal compared to the Antminer S2

Yep, their reluctance (or greed) to reduce the price while everyone was pissed off with BM has cost them greatly. What's better, sell 1 miner for $500 profit or 10 miners for $200 profit... spondoolies definitlely missed the boat here...

[Tigggger]

The SP10 is such a crappy deal compared to the Antminer S2

Yep, their reluctance (or greed) to reduce the price while everyone was pissed off with BM has cost them greatly. What's better, sell 1 miner for $500 profit or 10 miners for $200 profit... spondoolies definitlely missed the boat here...

Curious how you both think the S2 is a better deal

Price
S2:    $2359, 1000GH = $2.36 per GH
SP10: $2795, 1400GH = $2.00 per GH

Power
S2:    1000 GH, 1000W = 1w/GH
SP10: 1400 GH, 1200W = 0.85w/GH

PS Both are beaten on price by the A1 clones, which can be had for around $1800, or $1.80 per GH (if only all the dealers weren't sketchy)

[bitwitt]

Hi  I'm hoping someone can help.  I placed a order with Bitmain and sent payment from Coinbase. From my end it looks like everything went ok but
Bitmain shows they did not receive payment and now the order shows it has expired.  Where did my Bitcoin go? I have ordered in the past and have had no problem.  I just hope I didn't lose 2K worth of Bitcoin.
Any advice would be appreciated.  Thanks

Send an email to Bitmain to fix the order status, it happened to my order also, don't worry he will ship your order.
[/quote



Thanks for the reply . I sent email  and all is well. seems to a good company to deal with.   ]

[Biffa]

I replaced my Batch 2 PSU with a 1300W EVGA and its made zero difference to the hash rate.

cant say fairer than that.

perhaps my older batch 4 is just a lemon and my battered 'new' rig is a potential 1st place contender.

perhaps there are other limiting factors...

just because we paid for 1TH doesnt mean we should willfully ignore the possibility of a potential increase.

EVERY other rig ive ever ran has given more than it was touted as able to - eventually...

why should these be any different??

forgot to add  - the rig powered by my OCZ1000w hasnt dipped below 1TH in days - while both the 10 blade & 9 blade rig are powered by enermax 1000w and are fluctuating between 900 -1000Gh/s


the power cable for the OCZ is almost 3 times as thick as the enermax cable... and relatively cool to touch - enermax cables are considerably warmer.

It could be that you may be able to overclock the S2 with a better power supply, but from the people who I have seen try it you only get a measly 10% increase and at the risk of much higher HW errors. These aren't Jupiters that you can push to 50-60% overclocks, the entire design ethos around the S2 is different, these are basically underclocked S1 antminers crammed into a single box. I think the backplanes and power components on the boards just aren't built to handle more power higher currents.

Assuming Enermax cable is minimum 16 guage thats 10amp.  Could be psu is struggling at full load to supply the necessary amps to miner, because even 1000 watt  unit is most efficient at 50% load rating this drops at 95-100%.  Maybe switch the power cables for another test that would narrow down.

I'm sorry I see this wrong information mentioned so often I just have to say something here. The 50% load efficiency myth is just that, a myth. Modern, quality 80+ Silvier/Gold/Platinum power supplies are only 1-5% less efficient at 100% load than they are at 50% load, heck they are least efficient usualy between 1-25% load.



If you don't believe me read some proper PSU reviews from somewhere like jonnyguru.com, heck lets just go right to the review of the PSU that comes in the S2.

The Enermax Revolution 87+ 1000W http://www.jonnyguru.com/modules.php?name=NDReviews&op=Story3&reid=270

The difference in efficiency between 50% and 100% in the hot tests is 4% and in the "normal" temperature tests its 3.6%

So don't think because these PSU's are running at 95 or 100% they are only like 50% efficient, they still maintain near 90% efficiency even at full load.

[samsonn25]

Because of advertising they want the highest rating to advertise.

That 4% makes a big difference especially if the psu is rated at 1000 watts and the mining rig pulls 1050 or more.  I don't have experience with ener max gold plus 1000 but some seem to believe it is inadequate for the s2.

[NorTiaN]

Lo all.

About to pick up a couple more S2 but all my coupons have expired.

Anyone with some coupons spare a couple? Will tip!!
Name on bitmain site is the same.

Thnks all

[soapmodem]

Quick question: I'm looking around town for a place to host 4 Antminer S2's..

So far the best deal is a half-cabinet with a max power draw of 2.4kva. Would this be enough to power these four machines (totalling approximately 4000w)? Thanks.

[samsonn25]

"So don't think because these PSU's are running at 95 or 100% they are only like 50% efficient, they still maintain near 90% efficiency even at full load."

Obviously not, where did you get that crazy idea from. 

[Biffa]

Because of advertising they want the highest rating to advertise.

That 4% makes a big difference especially if the psu is rated at 1000 watts and the mining rig pulls 1050 or more.  I don't have experience with ener max gold plus 1000 but some seem to believe it is inadequate for the s2.

First, apologies your post got the self righteous end of my post, wasn't meant specifically at you personally I get you were talking more about the power chord being able to supply enough juice to feed the PSU.

Regarding the draw on a S2, it just means that it pulls more from the wall socket than 1000W which all PSU's will do if they are providing 1000W to the equipment they power, because no PSU is 100% efficient, so if its 90% efficient at full load it needs to pull near 1100W to give out 1000W (give or take a few W)

When people say that the rig is pulling 1050 they mean using their watt-o-meter, all the slightly lower efficiency means is that it pulls a few Watts more from the wall.

1050 watts at the wall in the case of the PSU on the S2 would mean its probably providing 916W to the miner (87.3% efficient) in fact in order to provide 1000W to the miner it would be pulling 1154W from the wall 

[Soros Shorts]

Quick question: I'm looking around town for a place to host 4 Antminer S2's..

So far the best deal is a half-cabinet with a max power draw of 2.4kva. Would this be enough to power these four machines (totalling approximately 4000w)? Thanks.

No, you only have enough power for 2 machines. 2.4 kVA can power a theoretical maximum of 2.4 kW at a power factor of 1.0.

[samsonn25]

Because of advertising they want the highest rating to advertise.

That 4% makes a big difference especially if the psu is rated at 1000 watts and the mining rig pulls 1050 or more.  I don't have experience with ener max gold plus 1000 but some seem to believe it is inadequate for the s2.

First, apologies your post got the self righteous end of my post, wasn't meant specifically at you personally I get you were talking more about the power chord being able to supply enough juice to feed the PSU.

Regarding the draw on a S2, it just means that it pulls more from the wall socket than 1000W which all PSU's will do if they are providing 1000W to the equipment they power, because no PSU is 100% efficient, so if its 90% efficient at full load it needs to pull near 1100W to give out 1000W (give or take a few W)

When people say that the rig is pulling 1050 they mean using their watt-o-meter, all the slightly lower efficiency means is that it pulls a few Watts more from the wall.

1050 watts at the wall in the case of the PSU on the S2 would mean its probably providing 916W to the miner (87.3% efficient) in fact in order to provide 1000W to the miner it would be pulling 1154W from the wall 

we cool  

Yes power delivery is a sketchy question indeed.  There is a "bell curve" for both the psu and also a "Bell curve" for the asic chips also.  This is where Bitmain will probably have a newer design soon with a redesigned chip I suppose as everyone else is going to a less than 1watt/GH now

[ak49er]

The SP10 is such a crappy deal compared to the Antminer S2

Yep, their reluctance (or greed) to reduce the price while everyone was pissed off with BM has cost them greatly. What's better, sell 1 miner for $500 profit or 10 miners for $200 profit... spondoolies definitlely missed the boat here...

Curious how you both think the S2 is a better deal

Price
S2:    $2359, 1000GH = $2.36 per GH
SP10: $2795, 1400GH = $2.00 per GH

Power
S2:    1000 GH, 1000W = 1w/GH
SP10: 1400 GH, 1200W = 0.85w/GH

PS Both are beaten on price by the A1 clones, which can be had for around $1800, or $1.80 per GH (if only all the dealers weren't sketchy)

Does the Spondoolies price include shipping?

I also heard that the 1.4TH/s is very dependent on your power setup, but I haven't checked in to the accuracy of this claim.

[samsonn25]

The SP10 is such a crappy deal compared to the Antminer S2

Yep, their reluctance (or greed) to reduce the price while everyone was pissed off with BM has cost them greatly. What's better, sell 1 miner for $500 profit or 10 miners for $200 profit... spondoolies definitlely missed the boat here...

Curious how you both think the S2 is a better deal

Price
S2:    $2359, 1000GH = $2.36 per GH
SP10: $2795, 1400GH = $2.00 per GH

Power
S2:    1000 GH, 1000W = 1w/GH
SP10: 1400 GH, 1200W = 0.85w/GH

PS Both are beaten on price by the A1 clones, which can be had for around $1800, or $1.80 per GH (if only all the dealers weren't sketchy)

Does the Spondoolies price include shipping?

I also heard that the 1.4TH/s is very dependent on your power setup, but I haven't checked in to the accuracy of this claim.

no include shipping last I heard

[klondike_bar]

The SP10 is such a crappy deal compared to the Antminer S2

Yep, their reluctance (or greed) to reduce the price while everyone was pissed off with BM has cost them greatly. What's better, sell 1 miner for $500 profit or 10 miners for $200 profit... spondoolies definitlely missed the boat here...

Curious how you both think the S2 is a better deal

Price
S2:    $2359, 1000GH = $2.36 per GH
SP10: $2795, 1400GH = $2.00 per GH

Power
S2:    1000 GH, 1000W = 1w/GH
SP10: 1400 GH, 1200W = 0.85w/GH

PS Both are beaten on price by the A1 clones, which can be had for around $1800, or $1.80 per GH (if only all the dealers weren't sketchy)

Does the Spondoolies price include shipping?

I also heard that the 1.4TH/s is very dependent on your power setup, but I haven't checked in to the accuracy of this claim.

its close to $200 to ship the SP10, and realistic values are closer to 1.25TH on 120V and 1.4TH on 208/240V. It is also the volume of a blow dryer when running. The design itself and the efficiency is terrific on it though   DC usage with 208V is ideal