well nuts!
All my BSODs started after I got back from 2 weeks holiday, turns out my Bios had reset to defaults and my memory was running at 1.8v, hence all the crashes. Just reloaded my bios overclock and its stable as a rock again.
/me feels like a numpty for making such a school boy error! but it never occurred to me the bios would have taken a floopy! Still thats saved a few quid![]()