S!
Osprey, sounds like some setting in BIOS does not like OC at all. I prefer to do it manually. So basically I have Default settings in BIOS and start from there. Most basic is to up core voltage slightly and then change the CPU multiplier only 1-2 steps at a time and test.
And I really should come to England as I want to take my son to Duxford Air Show to see real aeroplanes, no nintendo jets