ANTMINER S2 Discussion and Support Thread

[dalenorman2005]

sick of a B4 rig that wont stop dwindling down to 8xx i started pulling cards out and checking the thermal paste.

so far 4 out of 4 have been absolutely terrible.

right now with those 4 redone, i am seeing 11xx instead of 8xx

i did not restart or reboot, just pulled the blade, did the job, stuck it back in.

i will continue doing the remaining 6 when i have some time but thought some of you might appreciate a heads up.

Also, while only running 9 blades i saw 980GH/s pretty stable (about 20 minutes to remove, cool, brush, unscrew, reapply etc)

Are you serious - popping boards in and out of a running system doesn't make the whole thing blow up?  sounds very risky, no?

[smesterj]

My S2 was working fine for a week in eligius, after a payment delay decide to try Ghash, coincidence or not the HW errors went to sky, any suggestion?

[Junkbarman]

My S2 was working fine for a week in eligius, after a payment delay decide to try Ghash, coincidence or not the HW errors went to sky, any suggestion?

I figured it out. Put in on btcguild and see what happens.

[smesterj]

Lot of errors

[Junkbarman]

Lot of errors

Can't see any of your images. But I imagine that miner is broken, could sell it and try some s3's.

[smesterj]

Can't find the way to paste the image here 

[smesterj]

Elapsed GH/S(5s) GH/S(avg) FoundBlocks Getworks Accepted Rejected   HW  Utility Discarded Stale LocalWork     WU         DiffA        DiffR   DiffS  BestShare
17h29s  1070.89   1002.87            0             1426      13907      13     14968 13.63  813603      0    16752462  14009.91 14240768  115712   0           0

[nottm28]

Can't find the way to paste the image here 

http://imgur.com/

works here...

[Biodom]

Elapsed GH/S(5s) GH/S(avg) FoundBlocks Getworks Accepted Rejected   HW  Utility Discarded Stale LocalWork     WU         DiffA        DiffR   DiffS  BestShare
17h29s  1070.89   1002.87            0             1426      13907      13     14968 13.63  813603      0    16752462  14009.91 14240768  115712   0           0

looks good....GH, WU
ck says to ignore discarded shares
HW error just 0.104%
best share is sometimes not reported at all on some machines

[smesterj]

finally....... thanks !!

[smesterj]

[smesterj]

Elapsed GH/S(5s) GH/S(avg) FoundBlocks Getworks Accepted Rejected   HW  Utility Discarded Stale LocalWork     WU         DiffA        DiffR   DiffS  BestShare
17h29s  1070.89   1002.87            0             1426      13907      13     14968 13.63  813603      0    16752462  14009.91 14240768  115712   0           0

looks good....GH, WU
ck says to ignore discarded shares
HW error just 0.104%
best share is sometimes not reported at all on some machines

I freak out, never saw more than 300 errors.

Thanks, will start calculating now based on that.

[s1gs3gv]

Ok, its August now Bitmain. You said you'd have news about S1 and S2 upgrades in August.

What's the news ?

[ZiG]

Ok, its August now Bitmain. You said you'd have news about S1 and S2 upgrades in August.

What's the news ?

BitMain said ..."August / September..."...

Sounds like more like first week of October to me...If we get lucky...

ZiG

[dlowings]

lets discuss...

doubtful its 'just' a firmware update

much more likely is 28nm chips on new boards

knowing the chips rough ability in the S3, how many chips would be needed to arrive at '1.8-2TH/s' - or are we waiting on a 2nd batch of better chips??

considering some S2's currently hash around 1.0-1.1TH/s its not a huge increase for swapping out boards, that wont be cheap for the initial month or more

starting to see S2's for sale and wonder if these people are just upgrading to 28nm S3's or have calc'd that the upgrade wont really be worth it by the time it arrives.

etc

I've went over this a few times in my head... Here is a rough concept, let's say the kit is 8 cards would be around 1.8 TH/s I personally could live with that.. I'm guessing that 8 cards may need a slightly bigger PSU, I've not did the math on that part due to the fact that it's all a guess.. 8 S3 blades would do the trick, and it allow slightly better air flow. Honestly bitmain should have designed the s3 blade to be totally interchangeable with the s1 and s2, that would have drove down production and tooling costs in the long run.... I guess time will tell.

[Rabinovitch]

I'm guessing that 8 cards may need a slightly bigger PSU

They have answered me via e-mail that recommended PSU is Enermax 1050W 80 Plus Gold for this upgrade.

[edgar]

imgs as promised;



















actually forgot 2 pics and 1st image is from an older RMA worthy board.

img album... http://imgur.com/a/OZeA4#7

[dalenorman2005]

i just finished pulling the heatsink on one card and taking pictures of the poor thermal paste job.  not going to bother posting them now.  wow, some of those are a joke!  mine had a couple of chips without paste.  some of yours have a couple with paste.....

can you post what you feel is the ideal amount of paste?

i used one 4ml tube of paste for one board.  little dab on each chip.  hope it's enough.

will reinstall tomorrow.

[hurricandave]

Bitmain should talk to the Ketchsup gun makers for McDonalds, I bet the results would improve. I could have reduced their operating time applying paste by just handing them a couple low knap paint rollers.

[Honeycutt22]

i used a half grain of rice size on each chip and smear it with the syringe tip, then smoosh the heatsink in a tiny circular motion with pressure to spread it (hopefully) in all directions using the holes to see where im going.





i started on a btach 3 today and while the paste was applied better it has dried to a flaky version of itself.


what do people think about replacing the stock heat sink with 64 perfect sized ones? (apart from needing 640 per rig)

i imagine the increased airflow would be awesome but also have no experience using these little ones... are they as efficient as, or more so than the stock lump?

Not sure why all the issues with heat... But then again I have mine in a datacenter... Is it difficult to keep antminer s2 cool in a regular house?

This would be good info to know before I ever decide to ship them to my home.