ATX/Server PSU with 9 Volt, 10 A output and 4 x 6 pin connectors

[elrippo]

Hy all,
i am in the search for a PSU with 9 Volt and 10A output and four times a 6 pin connector.
Yes, you are guessing wright, i want to try out the recommended low voltage use in a antminer S5
I would be very glad if you can point out, where to get one of these PSU´s.

Kind regards,
elrippo

[J4bberwock]

Hy all,
i am in the search for a PSU with 9 Volt and 10A output and four times a 6 pin connector.
Yes, you are guessing wright, i want to try out the recommended low voltage use in a antminer S5
I would be very glad if you can point out, where to get one of these PSU´s.

Kind regards,
elrippo

Don't waste your time, the S5 won't be stable below 11v.
Best efficiency I got was 0.44W/GH at the wall at 11.11v, anything below 11v starts but fails after a few minutes or doesn't start at all.
At 12v, I was drawing 0.54w/GH with the same PSU.

If you are still interested, I'll have a breakout board for this PSU adjustable from 10 to 13.5v via trim pot in a few weeks.

Edit:
Pics
http://imgur.com/TjU2rZi
https://i.imgur.com/lhs1Gsm.png?1

[elrippo]

Hy,

that´s very interesting, since Bitmain states, that the S5 can be modded down with a 9 Volt PSU and at least 10A...
https://bitmaintech.com/productDetail.htm?pid=00020141222080420665NM851L7d060D

So then i suppose bitmain either doesn´t know what they are writing, or this is just a teaser from bitmain without a function 

[J4bberwock]

Hy,

that´s very interesting, since Bitmain states, that the S5 can be modded down with a 9 Volt PSU and at least 10A...
https://bitmaintech.com/productDetail.htm?pid=00020141222080420665NM851L7d060D

So then i suppose bitmain either doesn´t know what they are writing, or this is just a teaser from bitmain without a function 

It was advertised as 9v capable for the first 2 or 3 batches of S5, then, they realized that it won't work, so they removed it from the miner specifications:
https://bitmaintech.com/productDetail.htm?pid=00020150303095018716e2uWKIA70662

[elrippo]

Yes i noticed that, and that was a bit confusing...
But ok, let´s wait for the next Type, maybe it will have chips and control designed to run with 9 Volt and less then 10A each board 

[philipma1957]

Yes i noticed that, and that was a bit confusing...
But ok, let´s wait for the next Type, maybe it will have chips and control designed to run with 9 Volt and less then 10A each board  

sidehack has a thread with lower volting of the s-5 chip.  it appears the chip can drop quite a bit in volts the issue with the s-5 is board design.
the link is below:

https://bitcointalk.org/index.php?topic=995675.0


Looks like .34 to .38 watts a gh on the low end will be possible.

[sidehack]

I received some busted S5s last week, and when I have some downtime on the Compac project (while waiting for prototype boards to come in) I'll probably be back onto my inline regulator project. If I can find an S5 board among the pile that still works, I'll do some testing on low-volt and see what in the design is the failure point. I suspect the clock signal is being compressed too much by the level shifter and when the voltages move around it's not hitting thresholds. If I can find a straightforward fix to get them going at lower voltage I'll post about it.

[elrippo]

Thank you very much!!! Cool Thread!!!

[helipotte]

I received some busted S5s last week, and when I have some downtime on the Compac project (while waiting for prototype boards to come in) I'll probably be back onto my inline regulator project. If I can find an S5 board among the pile that still works, I'll do some testing on low-volt and see what in the design is the failure point. I suspect the clock signal is being compressed too much by the level shifter and when the voltages move around it's not hitting thresholds. If I can find a straightforward fix to get them going at lower voltage I'll post about it.

Where did you get broken S5's from?  Would love to take a crack at one of those!

[philipma1957]

I received some busted S5s last week, and when I have some downtime on the Compac project (while waiting for prototype boards to come in) I'll probably be back onto my inline regulator project. If I can find an S5 board among the pile that still works, I'll do some testing on low-volt and see what in the design is the failure point. I suspect the clock signal is being compressed too much by the level shifter and when the voltages move around it's not hitting thresholds. If I can find a straightforward fix to get them going at lower voltage I'll post about it.

Where did you get broken S5's from?  Would love to take a crack at one of those!

My soldering days are over double cataract  surgery will do that.

But if you could  run 4 boards on the controller and figure how to get 10 volts to  work with 2.2th hashing   it would be a nice machine.

10/12 = 83% 22/23 = 96%

So 83% power with 96% hash translates to  0.45 watts a gh

if you get it to do 9 volts   it is  0.4 watts a gh,  both very good for a 2th machine.

Sidehack is now getting a best number of .32 watts a gh on some of his 1 chip settings. see his threah.

[Tupsu]

.........
But if you could  run 4 boards on the controller and figure how to get 10 volts to  work with 2.2th hashing   it would be a nice machine.
.............

The last Bitmaintech software does not support 3 or  4 blade at one controller.

SD-S5-20150415.tar.gz   add anti-DDOS function.
 improve minerlink function.
 MD5: D0525C428E205C2471AB554CF95D77D3

[philipma1957]

.........
But if you could  run 4 boards on the controller and figure how to get 10 volts to  work with 2.2th hashing   it would be a nice machine.
.............

The last Bitmaintech software does not support 3 or  4 blade at one controller.

SD-S5-20150415.tar.gz   add anti-DDOS function.
 improve minerlink function.
 MD5: D0525C428E205C2471AB554CF95D77D3

the older software does. So hopefully if you have older broken gear it has the older software.  I  never do new bitmaintech firmware updates due to the difficulty  new firmware can cause.  plus they  make it hard to go back to older firmware.