Hi I may be wrong but I believe I hear a slight increase in fan noise when in idle mode or browsing web. Previously in high sierra it was non-existent I believe when doing simple tasks. But now I hear a slight increase. It's very soft, only noticeable when surroundings totally quiet and no big deal but maybe I was spoiled before when it seemed completely quiet. Anyone else notice? When launching Macs Fan Control, the Auto RPM says around 2000 on both fans. And it's the lowest it can go even when trying to adjust manually. Could it be that in High Sierra the Auto RPM was lower?