Use this CPU cooler with an AMD FX8320. The processor runs instead of 3.5GHz / overboost 4Ghz on constant 4,42Ghz without additional overboost. Under 100% CPU utilization on all tested cores with Prime95 about 1h to get with this cooler without the addition installed fans to max 56 ° C. A good value. Only the somewhat high volume at these temperatures has a slightly disturbing. But for also contributes the open housing, which is not indeed built there in each of these coolers. When the CPU VCore of something increases to get around on stable 4,6Ghz, where you then already comes to about 60 ° C CPU Temp.. Legal much higher you should not go in my opinion. Since I as housing an old Bigtower from 1999 used is out of coolers also about 1.5cm-2cm out of the case. (See photos) ;-) an American V8 has often an open hood where it can suck in the air, so it's okay ... However, everyone should want to obstruct this cooler into account the dimensions.