Well, I threw in iCUE before I knew iCUE would cause any issues. Though I don't understand your first paragraph.
The temp comment was my attempt at lamenting the weather around here - I was like, wait... why is the GPU idling so high(according to the iCUE log), then I remembered I'm being cooked alive as we speak too (31C in the shade today, and I don't have an AC, blech...).
Anyway, actual processor temps are pretty decent, given ambient temperature. And case airflow is quite good. I'm using all fan headers too(I think): 3 chassis fans and 2 processor fans (my cooler is the trusty old Hyper 212 Evo Plus or whatever it was, except the new ram I got was not low-profile and the normal fan got in the way, so I moved it to the back and got a slim noctua for the front, so now I got it in push-pull).
Random edit 2: That case is built like a tank. It's practically all metal and weighs accordingly. Has a 140mm in the back and front by the drive bay, and a 200mm on top.