I got an antminer S3+ last week(I don't know the batch version. Where can I find this info?)
And I powered it with one 400W PSU(12V1 8A+12V2 13A) + one 350W PSU(12V 18A)
Both PSU are at least 3 years old.
I mined for 5 days at clock=250M hash~500G normally, temp~44.
And what my power connection is:
(Look at the picture, black side is the side with network RJ45 and LEDs, red side has antminer S3+ mark)
(thus, #1 and #2 on same hash board, #3 and #4 the other hash board)
#1 with PCIE 6pin on 400W PSU
#2 with two 4pin -> one 6pin adapter on 400W PSU
#3 with two 4pin -> one 6pin adapter on 400W PSU
#4 with two 4pin -> one 6pin adapter on 350W PSU
https://i.imgur.com/uGiiUPN.pngYesterday, I tried overclocked miner to 262.5M and upgrade the cgminer to 4.6.1
(with this guide:
https://bitcointalk.org/index.php?topic=750220.0)
After two hours, I found the cable on #1 and #3 are so hot.
But #2 and #4 are not.(Not even "warm" at all)
This just like almost all current come from #1 and #3.
The current is not balancing among 2 PCIE on a hash board.
Then I swap #1 and #2 (so as #3 and #4) and test the miner.
All tests result that only one PCIE on a hash board is hot, and the other one PCIE is not warm.
(Sometimes #1 and #3 hot, sometimes #1 and #4 ......)
In a test after an hour, the 400W PSU suddenly stopped and broken.
So I get an 500W PSU today (12V 35A max 420W, with two PCIE 6pin)
And my new power connetion is:
#1 with PCIE 6pin on 500W PSU
#2 with two 4pin -> one 6pin adapter on 500W PSU
#3 with PCIE 6pin on 500W PSU
#4 with two 4pin -> one 6pin adapter on 350W PSU
Then, I set the clock back to 250M and start to test.
After about 30min, I found the cable on #1 is a bit hot.
And the cable on #4 is VERY HOT
(plastic not yet melt, and the VERY HOT part is the cable between 4pin and PSU, not the cable on adapter)
When I try to turn off the miner via PUTTY, the 350W PSU suddenly broken with burnt smell......
------------------------------------
(Luckily, miner/500W PSU/other things are all right)
Now I'm wondering why the hash board take many power from only ONE PCIE while BOTH PCIE connected ?
(The two PCIE's volt has some difference ?)
(Use 6pin PCIE directly from PSU and 4pin -> 6pin adapt at the same time will make voltage unstable ?)
(We cannot use different PSU to power the same hash board ?)
Finally I get another 550W PSU(12V 42A,with only one PCIE 6pin)
now this is the power connetion:
#1 with PCIE 6pin on 500W PSU
#2 with PCIE 6pin on 500W PSU
#3 with PCIE 6pin on 550W PSU
#4 with two 4pin -> one 6pin adapter on 550W PSU
so, 500W PSU power one hash board(#1/#2), 550W PSU power the other hash board(#3/#4)
And now still testing at clock 250M, hash~500G.
After 2 hours, #1 is normal(not warm), and #2 is warm but not hot
#3 is warmer than #2 but not hot, #4 is normal(not warm)
Is it safe to overclock back to 262.5M with this new power connection ?(hash~520G)
Or any other suggestions ?
A lot of Thanks !
-->I've learned that : *NEVER* use OLD POWER to power an miner or other high load machine !
