I own 1 of them 850w. Very good PSU's.
yeah it would be great if u could turn ON the fan even at very low RPM.
it did generate heat as i touch it and it was warm. but now i have an exhaust case fan instaled and it doesn't get warm anymore at all . anyway i have it for some months now and didn't notice the fan start even once . used it with an rx 570 sapphire nitroWhy? It's an 80 PLUS Gold efficient PSU. It's barely generating any heat at all.