Is running S9i at 1600W with APW3++ risky?

Hey everyone, I’ve got a quick question about the power supply for my Bitmain S9i. I noticed that the APW3++ 12-1600 states it’s rated for 220v and a max of 10A. Is it risky to push my S9i to 1600W? If I remember right, 10A at 220v means it can handle up to 2200W. So, for both the miner and the power supply, is running Braiins OS+ at 1600W, 1800W, or even 2000W dangerous? Appreciate any insights! Mickael

The APW3++ has a max. power capacity of 1600W. You can not exceed it. A stock condition Antminer S9i 14Th/s has a nominal power load of 1320W.

Ok, thanks for your answer. It's a question I was asking myself since some people overclock to the maximum and with 1600W it's relatively limited.

I would not recommend overclocking the S9 because it will shorten its lifetime.

Thank you

Hello, A small question about this 1600W power. I have one of my S9i that has a card out of order, so I unplugged it. If I leave the Braiins OS+ configuration on 1600W, will I have a maximum of 800W in each card or will the software automatically calculate to put only 533W per card? Mickael

That is not power supply dependent. That depends on how BraiinsOS works, which I don't know. You might want to go to the Braains thread and  ask questions about Braains there. https://bitcointalk.org/index.php?topic=5036844.820

Thanks for the tip, I've posted 😉

it should pull ⅔ 1600 = 1067 watts.

No it doesn't. Braiins OS+ delivers 1/3 of the power limit value you specify to each hashboard, doesn't matter if you have 3, 2 or 1 there is no need to change this value when you disable or remove hashboards. Do not run PSUs near their max rated capacity. The Bitmain documentation for the APW3++ clearly states that efficiency drops hard after 93.5% load, this means 1496W. The default in Braiins OS is 1420W (473W or slightly less per hashboard) which leaves some safety margin. The miners tend to be more efficient with lower values, such as 1320W if you want to match stock firmware and yet produce better results at the same power use. Many people go even lower to about 900W (300W per hashboard) which even lets them use 110v and remove one fan. BTW: In Braiins OS you can disable hashboards without the need to unplug them, just disable it in Miner > Configuration, at the Override Global Hash Chains sections the "Enable" check boxes.