Jennifer...
There was a thread a cpuple days ago about this very subject. And..since i'm a nice guy, i'll repeat what i said back then. It is a bit of a pain to install if your not used to using that type of clip (which i was not). And the fan clips will test your patience a bit. But... my cpu temp went down 8 degrees from 39 to 31 C. 2 degrees above the motherboard temp and 8 degrees above room temp. So..if your gonna O/C...its worth a small hassle.
Michael