and my miner went down.

A suggestion if you have 400 miners and you are popping  the circuits.

 run the 400 miners for now  with each with 1 board pulled and see if they can be stable.

better that then nothing.

A dragon miner has 4 boards disconnect 1 board on every miner.  will all get 750-800 gh for each miner. and you do not blow/trip the power off


I run into the heat issues on a small scale.

I had 13 pcs with 24 gpus  pulling 6k  I had to turn some off  or trip circuits.