No Overclock. Corsair 1200 ATX PSU that feeds a total of 3 Antminers. 1140 Watts at the wall.
That's cutting it too close for stable operation of 3 units, IMO :| FWIW, I've found it best to leave myself 20% headroom on PSU's.
Don't confuse AC with DC. 1140w AC input @ 90% efficiency = 1026w DC output. Well under the 1200w rated output.
So this means I'm good and I can discard the PSU as the potential culprit for the errors I'm seeing?
No, this mean what i say before, that your PSU is to small for 3 Ants. 360-390watt each x3 =1080-1170watt consume.
If your PSU bring 1200watt max output, you will got effective about 1030w. So in any case it is to low!
You can believe it, or test it as i wrote above, or wait for 10 more opinion with the same result.
Agree that it's close to the limit although I think you are still confusing input with output as someone else already explained:
1140w AC input (actually measured at the wall) @ ~90% efficiency = 1026w Output (the 1200 refers to OUTPUT not input).
Another example: if PSU was spec'd 600W at 60% efficiency, under 100% load (DC Output), it'd draw 1000W from the wall.
In any case, I'll split the load with another PSU just for the sake and see what happens! :-)