In my computer I am running an AMD FX 8120 cpu, 16 GB of memory, Radeon 6950 HD 2GB gfx card, Thermaltake TR2-600W power supply. I just recently bought a new case which is the Cooler Master Haf X. I have always had issues with my CPU overheating and I cannot figure out how to fix it. I have removed the heatsink which is a ARCTIC Freezer Xtreme Rev. 2 CPU Cooler - Intel & AMD, Twin-Tower Heatsink, 120mm PWM Fan . I have removed the stock thermal paste and put on Arctic Silver 5 Thermal Compound numerous ways and methods. CPU runs cool while just casually using the computer, but heats up really quick during a stress test or high performance game. If I exit the game it takes maybe 20 seconds to cool down to 38C. I have no dust in my computer whatsoever. As I have cleaned it numerous times. I have been fixing and building computers for a long time and now I'm at a loss. My 12V stays from 11.63V-11.88V, 5V is 4.956V-4.998V. All fans are working with no problems. No cables are blocking air flow. Any suggestions?