Thanks Pate pro for the temps and SPL data. Unfortunately my SPL meter doesn’t go down low enough for me to measure the PC noise.
I’ve got an i7 3930k overclocked to 4.2 all cores, with a thermalright archon SB-E X2 cooler with two Ty141 fans. It’s housed in a define r2 xl with three stock case fans. At the moment the case fans are running with the fan switch at 7volts
With a cubase project running at 75% asio, I get average core temps of 55-60c and the room temperature is currently about 20-21c
It was built by Scan back in 2013 and has been pretty much rock solid… The back case fan is starting to have bearing noise but the front two are still quiet.
I am about to replace the last remaining spinning disk in there with an SSD.
All this being said, I had heard that even an 18 core mac pro runs without it’s fans going and thus completely quiet for a majority of it’s time (dunno about under load though) and was wondering how they achieved that. Vital few provided some clue above and also, Pete Kaine of scan provided some answers on another forum.