Topic: ANTMINER S3+ Discussion and Support Thread - page 186. (Read 710164 times)

Realize my idea??? You just crushed my idea.



Strato

PS. Thanks that actually is good info. I'll stick with 3.

Well as I said I didn't buy them for the S3s. I already had them. So yes completely agree. The only plus I think is the Ax1200 would I think have better resale appeal. From time to time they are all sold out.

Strato

At 80% load, an EVGA 1300 G2 with a 1300WDC maximum output on its single +12V rail would be approximately 91% efficient and draw around 1144WAC at the wall.  This means that four S3s would have to be underclocked so each draw around 286WAC at the wall (1144WAC / 4); i.e. (1144WAC * 91%) / 1300WDC * 100.  This should give you a reference point to realize your idea.

The Ax1200i may be top notch, but I don't understand the desire to throw money at it unless it's for fun.  

For less than half of that I can get a Rosewill Lightning Gold 1300W PSU.  I know it can run three S3s because I've used it to drive three OC'd S1s without a problem.

I think the only think the Ax1200i has going for it is it is pretty.  Seriously.  Well, alright, you can connect it up to a PC to see real time values.

Otherwise, they look identical, except the Lightning has 108A on the 12V rail, and Ax1200i has 100.4A.  Everything else important looks the same to me .. fan size, warranty, efficiency (what is Platinum supposed to get you?).  Except price of course.

Again, I ask why?

(NewEgg has Lightning at $149.99 AR, only $10 more $20 less than the equivalent eVGA.  The Ax1200i is at $329.99.)

M

Also, it looks like we may have a few more AntMiner S3+ Units coming in than we have the power to drive power/psu wise.

I'm considering selling 6 of them. PM me offers if interested. Tracking says they will be delivered on Tuesday and we could ship out that same day via 2nd Day Air or Overnight from Zip 20910. Also use the UPS site to see delivery transit times.  Typically shipping UPS ground will actually be 1 Day - within 250 miles of my Zip, at a fraction of the cost of Overnight.

Make reasonable offers folks if interested folks. People are PMing me off my other post offers like .5 BTC shipped. These units are sold out. The next batch of S3+ units hasn't even started taking orders and shipment is likely more than a month away at best.

Please use the UPS website to get shipping cost and price that into your offer on the Box at I'm guessing 15 LBS per unit.

Best,

Strato

The Ax1200i really is a top notch PSU. I didn't actually buy them for the S3 units, I had 4 left over from my Litecoin GPU rigs that I've long since shut down.

But running 3 S3 units has been no problem. The PSU fan doesn't even seem to be at full speed. They've been running for weeks.

Room temperature may also affect the draw. Our Ants are in a cool server room, which helps keep them and the PSU cool. I'm also on filtered AC Power. So voltage off the wall might also factor into it. If off the wall you're Voltage is 116 vs 110, that's a 5% increase in power input.

Our large order of S3+ Units come in Tuesday (BitMain Shipping Confirmed Yesterday).  We've bought a dozen EVGA 1300 G2 Units. I am going to see how they compare.

Hoping I may be able to squeeze in 4 Units per 1300 even if I have to underclock. I'll post results and use my kill-a-watt to get you all numbers.

Strato

You do not need four PCIe power inputs, overclocked or not.  Ideally, each blade should have its own PCIe cable/harness from the PSU as opposed to connecting only one harness that splits into two PCIe connectors.

Loosely basing on the S3+'s published stock specs (@ 225M), three units would draw a total of 1065WAC (355WAC * 3) at the wall.  Note that I specifically stated "Loosely" as some manufacturers tend to conveniently understate/overstate specs for marketing purposes.  Expect the at-the-wall wattage to be higher than specified; the degree of which depends on the PSU's efficiency and the ambient room temperature at the time of measurement.  The Corsair AX1200i has a maximum of 1205WDC on its single +12V rail and is approximately 90% efficient @ around 80% load.  Three S3+s would then require 959WDC (1065WAC * 90%) from the AX1200i.  Therefore, the load exerted on the AX1200i is 80% (959WDC / 1205WDC) which is right around the consensus of 20% headroom for a 24/7 operation.  You should be fine.  However, whether to overclock further with your current setup or not would entirely depend on your personal comfort level/threshold as far as safety is concerned.  Obviously, your "headroom" or safety margin would diminish as you increase clock frequencies.

As a point of reference, each of my S3s are powered with a mere Corsair CX500 and have been overclocked to 243.75M for weeks now with ambient room temperatures reaching up to 40C (104F) at times without skipping a beat.

https://bitcointalksearch.org/topic/m.8227268

https://bitcointalksearch.org/topic/m.8471571

hi, i checked second fan of s3, seem minimum value for this fan is near ~6000-7000 and max ~7000-8000.
but first fan speed seem normal, and near 2000 ~ 3000.

what is problem? software issue? hw issue?

thanks for info.
after powering off psu and give it few minutes to rest all went to normal.
no dead chips.

is psu broken/ageing or it is antminer issue?
psu is corsair cx750 powering only this s3

I think you cannot set the fan speed, the fan rpm will adjust according to the temp if the water cooling can take down the heat the fan will reduce the speed

water-cooling??  send details on how you set it up.

I actually ran a couple Corsair AX1200i PSUs with 3 S1s overclocked 24x7 each for over 1 year with no issues.  I have also read in other threads that people are even running 4 S1s on this PSU - although I think that is pushing it.   With 3 x S3+ Neither the wires, connectors, or PSU are hot to touch and the fan is still running normal and quiet. 

Id recommend these beast's any day

More like there is no statistically relevant performance difference for Batch 3 S3's]


At least there is universal agreement in the responsiveness of the GUI.
On the issue of hashing faster or slower, that is subjective. Not all S3's are built the same (and I do not include the S3+ in this anology), and neither do we all set them up (and power them up) the same way. My batch 6 S3 running at freq: 262.5 hashes faster (pool side and GUI) with the stock cgminer. But there we are comparing oranges to apples .....

thx bro 

why push the expensive psu to it's limits or beyond it's limits ? that was the question i asked myself . . .

3 x S3+ @ stock freq (225mhz) consumes at least 1065W *depending on temps, supply voltages, placement, variation, etc* & the psu is rated 1200W so why push it that far ?

life span will be much shorter & higher chances of it failing such as the components, hot/melted wires or connectors so better not to push it too far.

just myself though, always prefer to be a little conservative. 80% - 85% of published rating is pretty good imo.

yes & yes & yes, it can go a little more than 1200W but ask yourself this . . . how far can it go with 365/24/7 operations ?

i think it would be more efficient, reliable, safe & conservative to OC 2 x S3/S3+ with a corsair 1200W axi plat psu. try that & i am very sure the wires & connectors will be not as hot as powering 3 x S3's.

maybe can try a cheaper 1200W psu powering 3 X S3's @ stock freq's or underclock it a bit. raidmax is not too bad

I've kept log of S3 performance in a spreadsheet. I track the number of seconds running, local average hash rate, hardware errors, DiffA, and DiffR. From these numbers, I compute the error rate percentage, and the DiffA per second, which I think is an interesting pool side performance statistic that can be compared against different configs running for different amounts of time. After each configuration tweak or update, I update this log and compare the results.

Whenever I make a change, I like to accumulate at least a days' worth of data before determining the affect of the change. You really have to give any changes some time to settle in, unless you're seeing dramatically bad effects (like ASICs shutting down). Also gathering more data over time should help average out pool side variability.

I'm currently running the antMiner_S320140721.bin firmware on my B3 units (I saw no reason to update). The only changes from the stock configuration were to set the "--queue 1" option on the command line, and a frequency of 237.5 (which is as far as I can push it). I've been running like this since around August 11th (which is when I settled into this config).

After running for 6 days with the new cgminer (the one with the security fixes) and no other changes, I can state that with my two B3 units there is no statistically relevant performance difference.

I wasn't expecting any difference with this cgminer update. I did the update because of the security fixes.

I'm posting these results because there are some people who think that this version will either make their hardware hash faster or slower. That is not my experience. All it seems to do is free up some processing power that allows the web GUI to run a bit faster (but that observation is a bit subjective).

I recommend that people who are concerned about the security fixes, or that want a slightly snappier web GUI, should update to this version. Don't expect it to magically affect your hash rate, in either direction.

Could just be slight variation of the psu. As in mine is 3% more efficient... Which is the go no go point.

It looks like you are keeping your unit in a very closed space without air circulation. If that is the case, then the water-cooling may not work properly either. I'd first make sure the cellar has good ventilation, at the very least an exhaust ventilation where you can point the blowing fan(s) to. If that is OK then:

1. First install your water-cooling, and when that is working properly, then the fan speed will automatically reduce. This will reduce the fan noise.
2. If the fan speed does not reduce and you are sure the watercooling is working very well, then open the S3 box and pull out the fan connections. This will stop all the noise from the fan.

EDIT: PS. I wrote the above with a straight face.

if its at the cellar i'm still hear the noise, also if a put my Hand behind the second fan its pretty hot, so my question is how to set the fan speed down cauz i wanna cool down the Chips with watercooling

Wow really?  My S3s are quieter then my S1s and they were virtually quiet.  What fans are you talking about?