ANTMINER S2 Discussion and Support Thread

[wpgdeez]

Its still double the price of the S1 per thash even with the coupon. S1 is the best bang for the buck right now.

[Syke]

Its still double the price of the S1 per thash even with the coupon. S1 is the best bang for the buck right now.

And S1 will survive shipping. Bitmain needs to fix the S2!

[elaramus]

I'm in for two of the batch 4 units... I'm hoping/praying/wishing for early shipment by Bitmain (remember the good old days?)

This is a little more pricey than the S1 solution, but the reduced equipment footprint and reduced power requirements were enough to sway me in my purchasing decision.

May 8th seems like an eternity from now, and the new S1 price looks good but May 4th is 1/2 of an eternity (and I just bought 18 of the S1's at .6something)

For current holders of the S2, how many PCI-e 6 or 8 pin connectors are required if a power supply change out is needed?  

[TracerX]

Its still double the price of the S1 per thash even with the coupon. S1 is the best bang for the buck right now.

And S1 will survive shipping. Bitmain needs to fix the S2!

I would purchase a couple if this weren't the truth, apparently.  If they can get them to customers without surgery involved in bringing them back up, I would bite.  Until then, no dice.

[klondike_bar]

It comes from the Antminer U1 overclock manual. But I think this should be compatible to Antminer S1, too.

Let's see the example of why 0780 and 4F81 are 400MHz.

HEX                   BINARY                          15/BS         M                               N                            OD
0780                 0000  0111  1000  0000       00          00 0111 1   = 15          000 00  = 0              00 = 0 which NO=1
4F81                 0100  1111  1000  0001       01          00 1111 1   = 31          000 00  = 0              01 = 1 which NO=2
5F82                 0101  1111  1000  0010       01          01 1111 1   = 63          000 00  = 0              10 = 2 which NO=4

Fout = 25 * (M+1) / ((N+1)*NO)

Fout(0780) = 25 * (15+1) / (1*1) = (25*16)/1 = 400 MHz
Fout(4F81) = 25 * (31+1) / (1*2) = (25*32)/2 = 400 MHz
Fout(5F82) = 25 * (63+1) / (1*4) = (25*64)/4 = 400 MHz

Actually, 5F82 is also 400 MHz, but due to the instruction below 500 <= Fout * NO <=1000
Fout(5F82) = 400MHz, therefore,  Fout*4 = 1600 and over 1000.

So I think I should not config 5F82 for 400MHz, according to this manual.
I don't say that it does not work (I tried it before understanding the HEX, it worked)
but you have also another 2 freq_values which give you the same MHz and get along with the instruction in the manual.

A little bit too long, anyway, I hope you enjoy my lecture, lol.

Any questions are welcome.

If this is useful, any donations/tips are welcome => 12QAQhbmTzV7sJ9sg8xT96JAneE4S89sS6  

I finally got around to doing the calculations myself for the antminer S2 - and so far it looks good (testbench was a U1, which on success menat the code could be applied to the S2 safely)

5002 = 206.25MHz
5082 = 212.50MHz
6206 = 215.625MHz
5102 = 218.75MHz

all three meet the requirements stipulated by the above rules and pattern.

5082 is currently giving a hashrate of 1095GH and error rate of about 0.95% after 15minutes.    (212.5 is 8.5% higher than the stock speed)

tips accepted at  1LQZnkJuUbdeVdxGjR27zkNJWSW4FSLBhh

newly added:   6206 = 215.625MHz

for some reason my system was a bit unstable at 218.75MHz.  it had ~2.02% hw errors, but something was causing either the miner or the psu to switch off and need a reboot. (the PSU is a modified DPS2000 so it should be plenty powerful, but the cooling fan i stuck to it might not have been sufficient)
212.5MHz gives ~0.75% errors, so hopefully the middle-step at 215.6 will be around 1.1% errors and more stable.

[Biffa]

Its still double the price of the S1 per thash even with the coupon. S1 is the best bang for the buck right now.

And S1 will survive shipping. Bitmain needs to fix the S2!

I would purchase a couple if this weren't the truth, apparently.  If they can get them to customers without surgery involved in bringing them back up, I would bite.  Until then, no dice.

I got this in email from them by email:
Me:

Hi guys,
 
I would like to check if the S2 packing has changed in any way to protect the blades more during shipping?
 
Mine had a few blades dislodged and the host card, I managed to take it all apart and put it all back together again and its working but it seems I was lucky.
 
Have you made any changes to how you pack and ship these to minimize the risk?

Bitmain:

Hi,

new strong casing, adjust the inter structure. it will be much better than early


Best Regards

BITMAIN

[conderus]

Hello

Have got this S2 CE certificate,and what is very significant,CE mark on the case (in visible place) ?

[Biffa]

Hello

Have got this S2 CE certificate,and what is very significant,CE mark on the case (in visible place) ?

I don't think they do.

[klondike_bar]

Hello

Have got this S2 CE certificate,and what is very significant,CE mark on the case (in visible place) ?

I don't think they do.

no markings on the case, and nothing on the control board or hashing boards. Its unlikely anything is printed on the backplane either

[Biffa]

Hello

Have got this S2 CE certificate,and what is very significant,CE mark on the case (in visible place) ?

I don't think they do.

no markings on the case, and nothing on the control board or hashing boards. Its unlikely anything is printed on the backplane either

Nothing on the external box either.

[googlemaster1]

Yeah, I have 10x coupons, so I'd sell them for like .1 a piece.

That said, I think I am going to wait a couple days.  Bitcoin looks like its in a little uptrend, and I rather purchase it for 4.x BTC than 5.x btc.  The difference might not be much in $, but I count my ROI in BTC.

[philipma1957]

It comes from the Antminer U1 overclock manual. But I think this should be compatible to Antminer S1, too.

Let's see the example of why 0780 and 4F81 are 400MHz.

HEX                   BINARY                          15/BS         M                               N                            OD
0780                 0000  0111  1000  0000       00          00 0111 1   = 15          000 00  = 0              00 = 0 which NO=1
4F81                 0100  1111  1000  0001       01          00 1111 1   = 31          000 00  = 0              01 = 1 which NO=2
5F82                 0101  1111  1000  0010       01          01 1111 1   = 63          000 00  = 0              10 = 2 which NO=4

Fout = 25 * (M+1) / ((N+1)*NO)

Fout(0780) = 25 * (15+1) / (1*1) = (25*16)/1 = 400 MHz
Fout(4F81) = 25 * (31+1) / (1*2) = (25*32)/2 = 400 MHz
Fout(5F82) = 25 * (63+1) / (1*4) = (25*64)/4 = 400 MHz

Actually, 5F82 is also 400 MHz, but due to the instruction below 500 <= Fout * NO <=1000
Fout(5F82) = 400MHz, therefore,  Fout*4 = 1600 and over 1000.

So I think I should not config 5F82 for 400MHz, according to this manual.
I don't say that it does not work (I tried it before understanding the HEX, it worked)
but you have also another 2 freq_values which give you the same MHz and get along with the instruction in the manual.

A little bit too long, anyway, I hope you enjoy my lecture, lol.

Any questions are welcome.

If this is useful, any donations/tips are welcome => 12QAQhbmTzV7sJ9sg8xT96JAneE4S89sS6  

I finally got around to doing the calculations myself for the antminer S2 - and so far it looks good (testbench was a U1, which on success menat the code could be applied to the S2 safely)

5002 = 206.25MHz
5082 = 212.50MHz
6206 = 215.625MHz
5102 = 218.75MHz

all three meet the requirements stipulated by the above rules and pattern.

5082 is currently giving a hashrate of 1095GH and error rate of about 0.95% after 15minutes.    (212.5 is 8.5% higher than the stock speed)

tips accepted at  1LQZnkJuUbdeVdxGjR27zkNJWSW4FSLBhh

newly added:   6206 = 215.625MHz

for some reason my system was a bit unstable at 218.75MHz.  it had ~2.02% hw errors, but something was causing either the miner or the psu to switch off and need a reboot. (the PSU is a modified DPS2000 so it should be plenty powerful, but the cooling fan i stuck to it might not have been sufficient)
212.5MHz gives ~0.75% errors, so hopefully the middle-step at 215.6 will be around 1.1% errors and more stable.

Been 30 years since I did this math.   I am playing around with a lot of s-1's

does anyone have a link to a bigger more expanded chart.
Say from  freq 175 to freq 425.
Freq
175

I am going to post a thread in support. Asking for people to fill in the gaps

[klondike_bar]

newly added:   6206 = 215.625MHz

for some reason my system was a bit unstable at 218.75MHz.  it had ~2.02% hw errors, but something was causing either the miner or the psu to switch off and need a reboot. (the PSU is a modified DPS2000 so it should be plenty powerful, but the cooling fan i stuck to it might not have been sufficient)
212.5MHz gives ~0.75% errors, so hopefully the middle-step at 215.6 will be around 1.1% errors and more stable.

Been 30 years since I did this math.   I am playing around with a lot of s-1's

does anyone have a link to a bigger more expanded chart.
Say from  freq 175 to freq 425.
Freq
175

I am going to post a thread in support. Asking for people to fill in the gaps
[/quote]

not much reason for such a range, since most of it is a mixture of hand calculations and a logic puzzle (last digit as '2' means twice half the frequancy as if using '1' and 4x as using '0')

the ranges to focus on are:   S1: 300-400MHz    S2: 196-225MHz     if you want a frequency outside that range you basically need to do the calculation with the end-frequency in mind.  If you have a U1 it makes an excellent test-bench since it runs at a very similar voltage and frequency range as the S2.

[ShopemNL]

I got 20 S2 -400USD coupons and 20 S1 0.05btc coupons anybody intrested?

[mdopro1]

I got my miner today and except 3 free spinning screws that I had to break everything inside was in perfect shape. I might know why too. See pictures below.



This rubber padding might have something to do with my miner coming in 1 piece.

[CroverNo01]

This rubber padding might have something to do with my miner coming in 1 piece.

Thanks for the update, I would still prefer to have my blades shipped all together in single boxes. I don't mind building also saves time at Bitmain end.

Could this be a possible option on the website ? would any other users agree ?

Not sure if Bitmain would take a group of concerns on board rather than just a few users so should take a count or a vote ?

At the end of the day it saves them hassle with RMA and pissed off customer if they just ship it how the customer asks.

[klondike_bar]

^mine arrived the exact same with the foam strips and good shape. also had 2 or 3 screws that were free-spinning that i pried out with a knife

[thomashrev89]

This rubber padding might have something to do with my miner coming in 1 piece.

Thanks for the update, I would still prefer to have my blades shipped all together in single boxes. I don't mind building also saves time at Bitmain end.

Could this be a possible option on the website ? would any other users agree ?

Not sure if Bitmain would take a group of concerns on board rather than just a few users so should take a count or a vote ?

At the end of the day it saves them hassle with RMA and pissed off customer if they just ship it how the customer asks.

Yes, packaging the cards by themself would be my choice.

[mdopro1]

Am I supposed to take out this foam? Is it possibly going to catch fire if I don't?

P.S. Nothing's perfect, I got an Australian cord. Where would I find a heavy cord to run this thing?

[smooth]

I got 20 S2 -400USD coupons and 20 S1 0.05btc coupons anybody intrested?

How does the coupons work? Are they transferrable?