Topic: ANTMINER S7 is available at bitmaintech.com with 4.86TH/s, 0.25J/GH - page 248. (Read 528055 times)

How many watt PSU per board do you use - all 3 the same or more on the controller board?

S7 gets better every time and with every shipping.

My first two were underperformed, with high HV rate. (Pictures sent for warranty)
Two weeks after this  two , I had a more better 2 x S7 with 600 stickers.

After that 8 x S7 and all are 4,8TH/s or better. No stickers.
11 are already on the way.
8 not shipped yet.
  So I am optimistic,  but still not satisfied with S5+ boards  build quality. Only one out of three is not needed for repairs.
I still think that with S5+ I got scammed with Bitmain China poor Guarantee service.

Ok, here is what I have:  #4 freq is 600 HW is .0256% at 4.579 Th/s (24hr),    #1 freq is 575 HW is .0296% at 4.707 Th/s (24hr)

Made changes,
After 20min:  #4 freq 568 HW is .0186% at 4.574 Th/s (20min), #1 freq is 593 HW is .0275% at 4.689 Th/s (20min)
After 60min:  #4 freq 568 HW is .0154% at 4.547 Th/s (60min), #1 freq is 593 HW is .0275% at 4.703 Th/s (60min)

My 4 from October 17 and three from October 21 not shipped.

From my experience I found that higher temps give a lower HW.  Either a hotter environment or slower fan speed will increase the temp and lower the HW of the miner.  Apposing this theory would be that electronics and heat are a bad combination.  In this, increased temperature may decrease the longevity of the miner.  Some Considerations.

I like your optimism in ordering ~10 S7 or ~20K worth in one "gulp".
Apart from it being a business, i don't see the need.  
I can always buy the coin and for fun 1,2 machines are just fine.

take that dud number 4 and drop freq to 568 see what it does.
take the slow number 1 and drop freq to 593 see what it does.

really look at the error numbers.

It got hot in NJ it is 66f so I will have to raise my fans. but my errors are spectacular in a good way.

How about temperature on the different miners, are the hotter ones hashing better?
I swear mine hash better at higher temps, 45-55C.

My numbers creep down at night it seems, when the temperature drops.

Pic from tonight:


I was running the fans at 90%, because I got scared by the firmware failure/lost internet error. I've set it back to automatic now, need higher temps.

One of my S7 seem to be hashing lower now than before, can't get it above 4,7TH/s, thats why I wondered about the PSU change.

That was my first change without a change in results.  It would still only obtain a 4.3 Th/s with the Bitmain APW3-12-1600-B2.

No, the B1 came clocked at 600, but would only obtain 4.3Th/s.  I tried everything so, I clocked it at all increments down to 575 and it has maintained 4.579 Th/s ever since.  All of these have been upgraded with the new firmware as well, which did not make a difference whether it was the 600 or 575 firmware for antminer4....I tried both.

Would be interesting to see antminer4's performance if you switched PSU. Run it with an APW3, will you get better numbers?

That B1 came clocked at 575?

sigh.....


 my order or B3's placed 10/20/2015 has not shipped yet ....

My order just shipped also - phew!    Check those heat sinks guys 

And let me envy your hash.

I wanted to post this as a reference to others as to how mine are running and with what.  Please let me know if you are seeing something I can improve or let me know if this information helps you.


                Scoring       Hash Rate             Hash Rate   Hash Rate         
               Hash Rate       (5min)                (60min)        (24h)                              PSU                           Freq     Batch
antminer2   5.008 Th/s   5.505 Th/s       4.972 Th/s   4.895 Th/s   3 x Antec 750w Platinum PSU            600        1
antminer9   4.997 Th/s   5.211 Th/s       4.895 Th/s   4.833 Th/s   1 x Bitmain APW3-12-1600-B2          600        3
antminer8   4.903 Th/s   5.444 Th/s       4.816 Th/s   4.831 Th/s   1 x Bitmain APW3-12-1600-B2          600        3
antminer7   4.924 Th/s   4.575 Th/s       4.655 Th/s   4.803 Th/s   3 x Antec 750w Platinum PSU            600        1
antminer6   4.720 Th/s   5.345 Th/s       4.783 Th/s   4.796 Th/s   3 x Antec 750w Platinum PSU            600        1
antminer5   4.733 Th/s   3.838 Th/s       4.797 Th/s   4.783 Th/s   1 x Bitmain APW3-12-1600-B2          600        1
antminer3   4.743 Th/s   5.580 Th/s       4.777 Th/s   4.749 Th/s   3 x Antec 750w Platinum PSU            600        1
antminer1   4.564 Th/s   4.387 Th/s       4.705 Th/s   4.707 Th/s   1 x Coolmax 1600-Watts Silver PSU   600        1
antminer4   4.602 Th/s   4.199 Th/s       4.553 Th/s   4.579 Th/s   1 x Coolmax 1600-Watts Silver PSU   575        1

I wouldn't take that as absolute. My 30% is doing 2,640 and 2,520.

I'm not going into it again, its been discussed 100x over. DPS-2000 with <16AWG wiring.

Quoting for good measure (and for easy reference).

My orders from
2015-10-19
2015-10-20

are shipped.

2015-10-23 ,  2015-10-24 , 2015-10-25 not shipped