Topic: Announcement: Bitmain launches AntMiner solution, 0.68 J/GH on chip - page 138. (Read 368268 times)

On wall power draw varies depends several things:

• 110v or 220v: Power draw of S1 will be lower if using 220v AC on wall, and higher if using 110v
• PSU efficiency: A golden PSU will have 87%~92% efficiency, while normal 80 plus has 81%. If you use some other PSU without a 80 plus certification, the efficiency would be even lower. http://en.wikipedia.org/wiki/80_Plus
• Voltage drop on wiring: There is 13.4~13.6A current on each blade, we suggest using 3 0.75mm^2 wires or a single wire at 2.5mm^2

According to our measuring, the power draw of the S1 Dual Blades from PSU is 12V*(13.4A*2+0.2A)=324Watt, 0.2A is for the fan when temperature is 25℃.
If you use an 90% efficiency PSU, the power draw from the wall is:324/90%=360watt.

Thanks a lot I will sticky this.

HW / (HW + DiffA + DiffR) * 100

so DiffA + DiffR is total Diff1 shares right? And should I divide HWerrors/(DiffA+DiffR) to get HW error percentage? Thanks

Diff is dynamic on most pools so you can't work out the diff1 equivalent yourself. Leave that to cgminer and it's DiffA + DiffR.

Whats the exact relationship to get Diff1 shares? LastDiff*(Accepted+HWerrors)? Thanks



@ 400MHz / 204GH/s the hw error % is 63,253/(63,253 + 3,543,296 + 41,984)% = ~1.7%, which is rather fine for a system operating at its limits Kudos to Bitmain engineers.

So is under 375-400W per unit the consistent power draw for the S1? I've read several different quotes as the power draw varying from 200-500W and only seen one actual report of 4 units at ~1500 for 375W each a few posts down.

EDIT - Clarified which miner I was refering to

I don't know what the normal expected range is for this hardware. Most ASICs, anything under 2% is good, but if hardware errors are expected to be already filtered out by the devices, then it's unknown what's ok. If your effective hashrate (based on the WU value) is good, I wouldn't worry about the HW error count.

I want one of these!

ckolivas,

thanks for clarifying that... i was worried my 2 miners HW count was getting high...

based on my HW count, one of them is exceeding 0.3 is that something i can ignore?

810/781798 * 100% = 0.10% which is still lower than 0.3 right
3225/773226 * 100% = 0.41 which is higher than 0.3

Wrong. 5.5 million diff1 equivalent shares versus 13.5 thousand hardware errors. You're making a classic mistake of comparing the wrong values. His hardware error count is <.3%

turtle83 , for the first batch, the there is some bugs for ASIC status checking. If you doubt the ASIC status, please contact our sales/supoort to update your control board.

Aexcu, it seems that there is something wrong with your miner. the number of HW is more than the number of Accepted?! it should be abnormal. For antminer, the number of HW is near zero. Please check your power supply at first.

Having played with this code to try and bring it into mainline cgminer, now it appears this is old non-working code and does not match the code distributed with the device. I have pinged them to try and get the most up to date code as I can't get this one working.

Thanks for bringing me up to speed!

Some of the photos to include the PCBs and how it look are here: https://bitcointalksearch.org/topic/setup-troubleshoot-bitmain-antminer-s1-180ghs-miner-344970

I don't think it's a bootleg product.  Power hungry came from running the chip at 2.8GH and their specs shows less power consumption if the hashing rate was lower.

They are more than capable of running 30-50 units per day.  I was at their production lines and when the they were pushing these out in full speed,  I could feel the ground shaking and it was actually fun looking at these finished boards coming out of the automation lines one after another. It's not a hand solder PCBs or chips.  These were done in the Japanese Brand equipment in the automation process with line of people doing the quality control by both visual and tester checks on each PCBs.  I think I can say is they are believing in the quality control to stay in for the long term.

It does hash away as they claim on the product spec.  I have one here and it does work.  If it came with the PSU it would even be better, but they could release these with PSU with a few weeks of delay.  ( I think the miners want the unit if it's hashing rather than waiting for a plug & play PSU)  Sooner we can have the miner is better of we are.

I felt like I was a kid in the candy store.

They have documentations in gethub i believe.  I know others speculated it was the re-branded avalon but i think it was proved false.

sushi would be able to say more; but heres my take.

Bitmain is a chinese group that presumably opted to create a working ASIC device before making it public, so that they could show themselves as a team capable of delivery. I got the Antminer from the first auction, and it shipped very quick using an expedited UPS service. Build quality is better than i expected (see the reviews on the past few pages) and is possibly the best delivered product so far in terms of build quality ive seen (i have not actually seen a BFL firsthand, but those probably are the overall winner for cleanest looking device). The funding needed to produce just 30 or 100 units at a time is likely very high, and the first few batches are in effect the beta testing. I would expect some simple but effective changes to be made in later batches

The chips are thier own. In terms of power-efficiency, they are middle-of-the-road, a little worse than bitfury or avalon chips running at the same speed.

Who is Bitmain and what is AntMiner?

I haven't really been following Bitmain.  Maybe someone can explain how it is that they can spend a fortune to develop their own chips and then only sell a few units at a time.  Certainly they should be flooding the market with their devices, no?

I don't know what it is but even though they are actually selling real devices, they still seem scammy to me.  Are these really their own chips or just Bitfurys in disguise?

my temps were around 43-48 and the fan was consistently around 4920RPM (listed) and at some points would rev over 5200 for a minute or so. Noise at 4900RPM is about equivalent to what id hear from a rack server, rather then a home PC. I run 2x230mm and 1*80mm fans for my bitfury at full 12V, and they are practically silent in comparison.

I replaced the fan with a 120MM PWM 17.3dB 70.5CFM fan to compare, and the fan (listed max speed 1500rpm) was showing around 2200rpm and very quiet operation. however, the airflow was a little low so i was forced to attach the original fan on the far end with it pulling from the heatsink, and used a 7V adapter to force it to run at a lower speed. it is still as loud as a gaming computer if not louder, and i plan to exchange it with a second 120MM identical to the one i bought, as this should ensure full but silent airflow.

I personally think it is simply a loud fan. whether theres something mechanically wrong with it or dust inside the bearings, it runs much louder than i feel it should or typically would for a fan its size. I am getting a second one from the groupbuy, and am interested to see whether the issue is the individual fan, or if im just being sensitive to the load whirr in the corner of the room


Has anyone (including bitmain) creaated an enclosure for this system? I assume it would be quite simply to put one on the stable frame and improve the continuation of airflow across the unit - right now i have some paper CD wallets balanced on top to keep the airflow from escaping halfway and it does make an improvement