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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.

So...when I loaded my A3 out of the box it was pulling 820 - 900. Did y'alls start at 600? I thought the 820 was standard and it's been running fine no errors or drops. It is loud as all get out though, blows the L3+ out of the water in terms of dB. The power cord is warm too, it is generating heat way beyond the L3+. I unplugged it once and touched the 3 prong and burned my hand they were so hot.

Also, there were pre-configured settings for mining using antpool (this is direct from bitmain, not an third party or ebay sell). Is this standard? I don't remember that for the l3+

Using standard APW3 and I haven't touched A3 in terms of OC.

1st batch had come out with 600 MHz frequency and they are indeed pretty hot my 5 pieces are running at 72-75 Celsius on boards and around 90 Celsius on chips, underclocked at 550 MHz

the reason the wire is getting so hot is because you are using the wrong gauge wire. A regular PC power cord (10a) is not enough for long term use. i went to sam ash and got a 13a power cord. now the power doesn't get hot at all.