iv got an amd 64 3700 and i want to overclock it. i was able to get it from 2.2GHz to 2.4GHz using gygabyte's program Easytune. it was stable for a while but then froze at boot up. i hav a gygabyte K8N-PRO SLI. i want to oc it as much as a i can without liquid cooling. how should i overclock it (thru the BIOS or EasyTune) and at what frequencies?