bit-Tech have a look at BFGTech's watercooled GeForce 8800 GTX
Even with the card running at its highest stable clock frequencies after playing through Oblivion for an hour, the GPU core temperature (as reported by NVIDIA's nTune system monitoring software) was lower than the idle temperature of our reference-cooled GeForce 8800 GTX installed in the same environment - this is a testament to how good the Danger Den waterblock on BFGTech's card is.BFG Watercooled 8800 Review