Thanks for your trouble Bob. Looks like I'll have to get a new one.
I'm looking at two overclocked i920 bundles from Overclockers.co.uk.
One comes with a Noctua HSF and the other with a Corsair H50 self contained water block and radiator.
The one with the Corsair H50 is slightly cheaper but I can't seem to find any definitive answers as to whether they are good or not.
I'm using a slightly modded Cosmos S case-I had to move the side fan forward to make way for the Tuniq so it now sits in a perspex panel.
The H50 exhausts into the case but I have 3x120mm exhaust fans on the top so I'm thinking that it will take the heat out the top.
Any suggestion on which bundle to choose would be welcome
PS think I might start this as a new thread in general section