4.3GHz Prime95's running fine with 143x30 and 1.336 Vcore, 1.6 QPI/dram (cpu vtt). Trying to push further; I've read that I have a chip from a good batch.

In my BIOS, it doesn't say Vcore anywhere, I've been assuming that is what "CPU Voltage" is. But what's weird, is that even though I've been increasing the CPU Voltage, when I get into Windows, CPU-Z still stays Core Voltage is still the same (1.344).

I increased to 143x31 (4.43 Ghz) and
increased CPU Voltage to 1.34. boots fine, freezes immediately on P95...
increased CPU Voltage to 1.350, boots fine, freezes immediately on P95...
increased CPU Voltage to 1.356, boots fine, I got about 10 seconds out of P95 before freezing this time tho...

I'm not sure what the max Vcore is for this chip (Intel website states VID is 1.375; not sure what this is exactly)? I've seen another person state they're running with 1.4 Vcore though...

Thoughts? Should I keep increasing voltage a bit more? Is there something else I'm possibly overlooking?