thanks for your replies autotech,
yesterday i pulled myols psu ( OCZ Game X Stream 1010watt ) and put in a 700W Cooler Master GX Lite 80PLUS and fingers crossed as i havent had the problem since and trust me a whole day without this problem is a big thing.
maybe my psu farted on 1st power up and caused the bios corruption ? or its just not cut out for these new bits or simply on its way out? either way ill keep it in for a few days to make sure my problems gone before i replace my old psu.
i only changed psu when i checked my order history from where i get my parts from and found my psu to be 5yr old
once again thanks for you time autotech, ill keep yous updated on how things go, would be good to hear from evoaddict on how hes getting on?