I ran my A3 overclocked at 930 Gh/s average for over one month with (low hardware errors under 2k/day per board)
I used 120V power on APW3++ and it worked like a charm!
Temperatures averaged around 62-65C for boards and outside room temps were between 60F-80F
I would say bitmain's PSU is stronger than it seems and does work well!
This is a dangerous example, since overloading the power supply may end up breaking it.
The input circuit in the APW3++ is designed to be able to handle max. 1200W at 110-120V and max. 1600W at 220-240V mains voltage.
I've also been running miner around 900-930 Gh/s (Overclocked from 600-650) and the power doesn't go above 1200W, it stays around 1180W on my A3's. Temps on boards are around 88C-93C with good air circulation and before at room temperature the miners would run stock at 80C-85C. After talking to Bitmain support the boards can run up to 115C before overheat protection kicks in but I would not like for the boards to get above 95C.
Hi!.
How to get a power of 1180-1200W?. When I set the A3 to 650, my power is at about 1450W!!. Do you have an APW3 power supply?.
Did bitmain tell you that the board supports up to 115C ?. I think it's a very high temperature..
Anyway, when I put more than 640, it starts to give a lot of errors and the hashrate fluctuates a lot.
Best regards.
I'm using an APW3 power supply. What I did was overclock to 650 then after the settings are changed I rebooted the miner. When it first comes up I can see the power spike to over 1400W and then after a few hours it slowly settles in at around 1180W-1200W. Yes bitmain support said the chips on the boards are rated for 115C but from my background in computers I wouldn't recommend going over 100C. All miners are different but mine seem to like to be at around 650-662 which appears to be the limit of the boards because any higher they start to get lots of errors.