Quote from: edgar on July 10, 2014, 01:56:01 AM

Quote from: TracerX on July 09, 2014, 01:29:48 PM

Quote from: kanes on July 09, 2014, 01:25:18 PM

i got alot of discarded. is it normal?

FoundBlocks Getworks Accepted Rejected HW Utility Discarded Stale LocalWork WU DiffA DiffR DiffS BestShare
0 12794 121364 1021 141433 13.61 7083190 7 146824619 14022.75 124276736 1045504 0 0

Yes, the S2 manages to create a high amount of discarded shares.

edit: I could have swore I stumbled across a calculator that included discard calculations, but can't seem to find it just yet...

i read somewhere that kano has produced a much better FW but i havent seen or heard from anyone using it..yet

This is my first real post here and I feel I should offer my contributions and findings to help the community...after all we are one...and there does not seem to be a lot of concise information regarding this miner...so here is my attempt to sort things out and help Grin

I have been using both the Kano and stock bitmain firmware...hate to say but the bitmain FW needs a LOT of work still..such as miner taking 4 minutes to restart...certain miners always seem to restart after 15-20 mins then are ok for days....I have my S2 mixed between both firmware and am torn on the results...1 S2 with 6/19 firmware found a block so Im happy about that.. Cheesy

You can get the Kano firmware here:
https://github.com/kanoi/cgminer-binaries/tree/master/AntS2

With Kano firmware miner just seems way more responsive ...to be expected considering who he is...and hats off to you Kano for all of your contributions !!!
its kinda like using S1 with kano magic...nice touch to see a block found indicator on screen and more accurate temperature reading for starters...it even says "upgrade is successed" when the firmware upgrades..I don't know how that simple thing got passed by for the firmware upgrades by bitmain...all the screen does is HANG during upgrade and all you can do is WAIT
I eagerly await the next version which is supposed to address p2pool issues
Right now I am just trying to make sense of the chip timeouts (I gave up trying to figure out at what point the QC passed sticker was put on the case but my guess is when it was empty)....I wouldn't recommend overclocking these boards unless you upgrade the PSU..especially with the horrible job bitmain does of grease (see for yourself what hides under that heatsink...worse thing I have ever seen...but back on topic)...this is with all boards cleaned and re-greased PROPERLY...what a difference Roll Eyes

Right now the biggest thing I see is the amount of rejected shares...seems to depend how the S2 boots up...sometimes I see a ridiculous amount of rejected shares at startup..other times its ok...there is a lot more at play here than meets the eye but Im working on figuring it out....I have 8 S2 and they are all different...in every way from fans to case to boards... 4 batches? I think not...
All S2 have had PSU replaced with EVGA 1300
Using 215 Clock I am hitting 1.1TH according to miner and pool anywhere from .2% to .5% HWE
It would be nice if Bitmain could take a minute and actually put a proper config file in the S2 rather than a cheap hack of the S1 asic-freq file ...all that shows to me is the lack of time and effort taken by the manufacturer...how hard is it to put chip values in the proper range...400MHz with those heatsinks...really Huh

I see different timeout recommendations in almost every thread..the only one that is constant is 40....but that seems to be the worst chip timeout of all..at least for the clock speeds and output I am looking for...
Enermax PSU may be good for 220v...but rather poor efficiency for 110v after all they test in Europe with 220v not North America...I asked for 110v cables which should be included in North American shipments by default but that made no difference....no matter when REPLACING THE STRAINING STOCK PSU with 14AWG cable at same time
One last thing...what does that white piece of paper with Chinese symbols and numbers that ships in the box mean??? I hope it is not important as I cannot understand it...English would be of great help there ...something to do with the order of the plugs on the board and PSU connectors perhaps...moot point with single rail PSU Huh

I see Bitmain has released some useful info regarding S3...why don't we have this type of info for S2...is it due to PSU limitations with stock config? I hope so
Can we get some similar info for the S2

THESE ARE S3 values DO NOT USE ON S2
S3 Datasheet Values
Voltage(V) | Hash Rate(GH/s) | Current(A) | Total power(W) | W/GH
0.72 14.18 10.40 7.49 0.528
0.75 15.75 12.24 9.18 0.583
0.80 17.33 15.20 12.16 0.702
0.85 17.33 20.00 17.00 0.981

Clock Freq. (M)|Hash rate (G)|Reg. value|Ideal delay (ms)|Recommend delay (ms)
100 6.30 0783 42.6 38
125 7.88 0983 34.0 31
150 9.45 0b83 28.4 26
175 11.03 0d83 24.3 22
200 12.60 0782 21.3 19
225 14.18 0882 18.9 17
250 15.75 0982 17.0 15
275 17.33 0a82 15.5 14
300 18.90 0b82 14.2 13
325 20.48 0c82 13.1 12
350 22.05 0d82 12.2 11
375 23.63 0e82 11.3 10
400 25.20 08f2 10.6 10

Sorry if this post is a bit off topic..all I have been doing lately is sorting out S2s....the joys lol
It would be nice to be able to upload screenshots...I have loads