Which to trust? On my 4670k the bios says it's up to ~1.15 but cpuz says 0.88. Temps rarely hit 60C (with gpu and cpu load on the system), but usually max is around 55C so I'm no where near a thermal limit.
BIOS voltage are without C states, that's why you see higher in BIOS than windows because when the chip are idling or under low usage the voltage will be low, but also the BIOS voltage are no near to show the load voltage.. so best way to check the voltage would be to have CPU-Z or Aida64 open while you test. What app are you using to test stability?.
Nah, for me I think it's just wrong. Lets just say, my vcore was not set at 1v to get that result (which wasn't stable).
I use prime95 for initial, than if I'm happy with that I run p95 and furmark at the same time to test my loops ability to keep up. I know there are better, but they're pretty easy and do the job.
edit. it was just an out of date cpz. and updated one works better....I'm an idiot.