I've got 8 x rx580 on 2x750W PSU - 1.1kWh
6 x rx580 on 2x650W PSU - 0.9kWh
I've got GPu hangs everyday (also freeze windows) and read that PSU can fix it.
But is it possible with so much power left in PSUs?
If you GPU overclocked and there is no low voltage mod, I think your PSU overloaded. My overclocked 6x570 farms are running on 2x775W PSUs and it is now about PSU's limit I think.
It happened cuz 750W on PSU label does not give you efficiency of 100%.
Thank you for your reply.
I should also mention that all of them are Platinum so highest efficiency possible.
And usually in both is same card every time.
If they are undervolted and clocked sensible, and you are not dual mining, your PSUs are not the problem. Is 1.1 and 0.9 what you measure at he wall? If you know what GPU it is that hangs, lower its memclock. Have you used Hwinfo to see if any GPUs generate a lot of hardware errors?
A PSU can deliver its rated power and will pull more than that from the wall. You do not have to take the efficiency into account to find out what it can deliver. Running it close to 100% might not be a good idea tho.