Hi, I would like to apologise for the delay in my reply (I just saw my junk mail :D
I currently have an i7 7800x it is perfectly cooled in high performance does not exceed 55°C, my maximum 48°C
You can go with your eyes closed.

Hello, of course it works perfectly with 10900k, its 240mm radiator allows to cool it very well. You can go with your eyes closed!