No stock cooler here, got a Noctua HSF....cool and quiet
My OC is limited to 3.2 though 'cuz my case is located near the furnace and temps get higher than I'd like. Still, not bad for a 6300
Am at work so can't check volts, but I'm positive I got vCore at 1.35v. Not bad for 3.2ghz I'd say 8)
1) Flash your BIOS
2) Rescore your system in Vista
3) Check CPU-Z.
If CPU-Z reads correctly then you're fine. Rack it up to Vista growing pains.......