You need to dissipate around 200W of heat if you're running at 4.6 Ghz and your cooler has a TDP of 150W. You'll never get full performance out of a 9900k with your Hyper 212 EVO. #Cooler master hyper 212 installation am3 full# while waiting for my NH-D15 to arrive I was running the Hyper 212 EVO from my old computer on my new 9900k. It took less than 30 secs sustained load for it to throttle at stock settings.
