Asrock Extreme 4 can also boot with 2600K to 5.5Ghz

[Cy4n1d3]

But additional Vcore (1.43A) seems to be gone?
It's down to 1.52 again for me (1.5) :\


Any idea why I can't seem to overcome 4.5 Ghz?

I'm stable at 1.248V @ 4.4Ghz, but any higher than that and it won't even boot.
Tried up to 1.6 Vcore, no success. Also, bclk over 101.5 Mhz seems to be impossible for me :\



You can see my current settings on that screenshot.

I'm not that new to oc'ing, just seems to be a bad chip or something like that? Don't think the board is limiting me :\