Ok, stopped every fan aside from 2 on the radiator to hear clearly, the pump has an audible hum when cpu idle (similar to this one but a bit quieter https://www.youtube.com/watch?v=0XEiWYiGRm0
During a realbench stress test the humming seems to go away and as soon as it gets into < 40 C territorythe noise stars again. Any ideas?
LE: temps go up to 90 during the realbench test ( ~10 minutes)
Edited by FoamyV - 1/11/17 at 8:59am