The OverClockers BSOD code list

[Sam_oslo]

I'm using fixed voltage and for some reason when I manually overclock I lose the LLC option on Asrock P67 Pro3. I'm guessing it's not enough vcore. But I pass 10 passes of IBT, 20 passes of LinX and it crashes while surfing or idle.

If it were vcore I'd think LinX or IBT would fail.

With that description, probably it's related to your RAM/IMC, but some of these early BIOSes, a buggy one, can act that way too.
You could try to run a memtest, and if it passes, the try a little 1-hour Prime small FFT. In this way you can determine if it's the CPU/vCore or RAM. If both passes, look for BIOS update.