If windows detects it properly, then I would run cpu-z, a free download. It will tell you what speed the cpu is running at. It may be slower due to cool and quiet, amd's energy saving software. You can disable it in the motherboard bios, but I would run with it. It will automatically increase the cpu speed as needed. If your board posts with "unknown cpu", then you may need a bios flash to get it to recognize the cpu properly. Check the asus website for bios updates and check the bios version at the top of the screen when you system posts. If you already have the latest version, no point in flashing the bios. If done wrong, your board will go dead, and require a new bios chip. If the cpu is running at the correct speed in windows, you won't even need to flash it. Not worth the risk of a dead board.