Idk how to describe how loud it is. It's way way way louder back when I started mining eth, cramping 4x reference 480 in my full tower at 100% fan speed. Doesn't even come close. Have you seen genesis mining videos where people need to shout to hear each other? It's getting close to that as I have 25 of them running.
Correct, it's AFB1212SHE. This one
https://www.amazon.com/Electronics-AFB1212SHE-120x120x38mm-Cooling-connector/dp/B004Y1HLA8Temps are slightly better than my old open air setups. Well it's not a fair comparison as my farm was permenantly at 40 degrees C with all the open air rigs. Now with proper sectioning of cold/hot air and tripling my exhaust fan capacity, air intake is basically ambient, 25-30 degrees.
I am planning to stack 20 of those in single room , problem is that the farm is located in residential area so being quite and hot is better than loud and cold , i might need to check if i can lower the rpm from bios of find a quieter option or ditch the whole case idea .
The K17 case arrived with Delta TFC1212DE which i had to run it at 25% from the Bios to be acceptable , surprisingly it was much quieter when the case was full with 8 GPUs compared to only 4 GPUs , the woof sound was much better
My open air farm have around 82RX + 8TI +6GTX in a room that measure 12*3 meter with no forced ventilation , only Mosquito Window Mesh , i plan to stack the cases in 5*5 room and install large low rpm exhaust fan.