Just looked at chrises pc and lololol :P
It is the PSU thats gone but when itook it out it was like a cardboard box xD Felt liek it was empty.
As you know I dont often recommend well branded PSUs, but i also dont reccoment geting teh ones that are literally the cheapest around.
After a bit of searching we found that his PSU was worth 20 quid and had 2 12v rails, 16 and 18 amps, which only works out to 408w on the 12 rails.
Weve looked and ive reccomended this :
http://www.scan.co.uk/products/850w-...-fan-atx-v2PC2
It has a total 12v output of 672w and will be more than enough.