Cold bug? Explain...are you meaning the card fails to run because the GPU is too cold? This really only takes place when using LN2 or a compressor to run below-freezing temps on components...not with watercooling only.
Remember, watercooling will never allow you to run anything cooler than ambient air temps, so its the same thing as starting up your box with the stock coolers on at room temps.
yo thats also what i thought but i have numerous search hit for this in goolge on overclocker sites and it might be just applying for the high temp beast 5970 from ATI, other option maybe to flash the bios but i would like to refrain from doing so since im not experienced in this and alien bios might make the card unusable and inrevertable...any other thoughts on this?