You could also pick up a few evaporative coolers, that might lower the temps 10 degrees depending on the size and quantity you get. The cards are probably causing very low humidity anyway.
How important is noise with your situation? Are loud fans an issue?
If you weren’t lowering the power limits then it must have been staggering how much heat your computers were putting off. Ha ha any idea how hot the room was getting? My office had pockets that were over 110 Fahrenheit in the summer before I figured out my cooling. You WILL NOT cool the air cost effectively with that many cards. It is just about replacing the air with cooler air. Presently, I cool the computers in my office with 12" inline fans (meant for the marijuana industry) and they just exhaust the hot air outside. They move about 1000 CFM each. They are relatively quiet and can be made more quiet with baffling material.
Well i am not quiet sure , i rented the room in the warehouse and gave them my terms with needing this much power / exhaust installation / going to be a nightclub in the room with the noise / and obviously security etc. In the video i missed out 8 drum fans i bought yesterday cuz i had a little issue with some pcs heating up, and the room was a little hot in the back of the shelve but behind the fans all the air is cold as i aimed the AC below the fans so they make cold airflow and keep the heat in the end of the room. I positioned 1 drum fan in each corner behind the shelve aiming 90Degree shooting the hot air straight to the exhaust. The remaining is aimed at whatever rig is missing air to keep it cold to avoid it overheating and generate less heat to keep the room cooler its like a game hahaha
in regards of the power-limit if i didn’t lower it, the room was literally a microwave. The heatwave was rounding the room like a blast wave. All the pc’s were auto shutting down from how boiling it was. But i started understanding the 1080’tis are usually hard to mine at 80+% if you dont have an INSANE cooling strategy, i believe if i ever expand i already have the experience to be able to run it at that % but i will for sure need a bigger room and i will not need that much A/C there are waay better ways to cool them but its too late for me to go and start throwing money to redo it. I think it was a pretty good job for starting up , hopefully will expand if things goes well.
this is my new setup btw , the video previously was 2 shelves.
Looks like you are doing really well!