Looks like we both got a good result then in the end
Overall did the install go as expected..?
I decided to reinstall Windows, forgot how much I disliked doing that. It is the time to configure everything afterwards that takes time.
The 9900k seems to run well at 5Ghz across all cores but you do need to keep it cool. Be handy in the winter
It's actually not that bad, only very toasty when running stress tests. What I have found that it runs at 5Ghz across all cores in Cities Skylines, for example, but the loading is very low, even compared to my 6700k.
One day I might try out an AIO, seen your sig, just too concerned of waking up one morning to find something wet and moist on top of my GPU...!