I have a P8P67 Deluxe and a 2600k processor, the system works great and at 3.15 I have OC'ed as high as 4.8GHZ (I want to set stable 24/7 Stable at 4.7GHZ). So all is fine there, however I have 1 major and I do mean major issue.

If I overclock at all I mean from 3.4 to 3.5 or from 3.4 to 4.7 then the system will not boot correctly if shutdown. If I reboot everything is fine, but if I shutdown the system (sleep or hibernate), then when I try to start it up it fails to start.
The failure occurs in that the PS and fans spin up, but that's it, nothing is initialized on the MB and I have to hold power for 5 second to force reset the system (I've left it like this for over an hour without any change). Then it will reboot say that OC'ing failed press F1, I do so just go to discard and it boots fine, and OCs without issue. I've tried every BIOS released to date all react the same way, I have also change PS units as I thought it might have been bad, os it is something to do with the MB and CPU.
My problems come from the fact that this is very annoying especially as I normally boot this box remotely and it if does not start then I need to physically go to it to force it to startup, which is not always possible when working remotely.

I'm looking for why this MB and CPU is crap when it comes to being able to start correctly and how to fix it since its current behavior is 100% unacceptable.

Thanks,
ERIC