help on cpu fan

well amd is very sensitive when it doesnt have enough coolin power to cool the cpu, the computer wont start.

If you're really having that happen to you, it's not the processor fan.

If your computer won't start it's likely the Mobo or Power Supply.

If your computer starts but won't complete the boot process, it's either because your processor fan doesn't work (and the Bios settings shuts the computer down), the Mobo thinks the processor fan isn't working, or it works, but very, very badly. And by very, I mean very, very.