I am super new to over clocking CPU's. I was told to use AMD overdrive but that seems to lock me out from making any real changes. How do I overclock my athlon II x4 640? Thanks.
You need to do the overclocking in BIOS to achieve the high overclock. If your motherboard has no overclocking feature in BIOS, your only option would be to try SetFSB overclocking software.