I use Noctura NH-U14S with the optional second fan. I see idle temps in 35-40C then under full all core testing it gets to 73-74C even if I leave it like that for 20-30 minutes and all cores are running at 4050-4125mhz. I do have a tone of fans, 2 Noctura 140mm top of case, 2 in front of drive...