OK Phazz, here is the result using Prime. the temps are actually lower. What test do you WANT me to run?
What's more likely is that the temps in your system aren't being reported correctly and you're shortening the lifespan of your hardware.
It is an undeniable fact that a Hyper 212 EVO black edition is a 150W TDP cooler and the 9900k draws 200W+ at stock. You really should check that out.
EDIT: Oh and if you really wanna know which test to run. Prime95 "Small FFT's" is the one to use to push the CPU. If you use "Blend" you should run it till it's gone through all the tests to make sure. Exactly how long that takes I don't remember, but it's more than 30 mins.
I do remember however that "Blend" starts with Large FFT's, which... read the description.
You should also get a program that watches the power draw. It should be 200W+. It might even be 225W. Personally I use Core Temp for that.