i have a AMD sempron 3000+ on a biostar NF4 4X-A4 i'm trying to OC. i can OC up to 2.1ghz anything after that and my comp freezes after whille. my guess is i need more voltage? when i go into my bios i can't find anything that lets me increase my voltage. also wtf is wrong with my speed fan? take a look. the only thing that is moving is temp 3. top two stay at 127C (wtf?) and bottom ones stay at 40. mobo = pos?