Is there a way to change what speed the fan on my cpu heatsink runs at. I have a p4 2.8 ghz (overclocked to 3.2) Gigabyte ga-8ipe100g mobo, and an Ultra copper cooling cpu heatsink that is rated to 3.4 ghz. How do I change the speed at which the fan is running. Currently it's running around 3200 rpm and is rated to 4200.