drani
I'm in the same boat. Have the same video card only it is an Asus version.
I took apart the video card, removed fan and looked at the heatsink.
all it is is a piece of copper with a heat pipe soldered on it.
So I figured i would just do the same, order some copper sheet and cut it to identical size, then solder copper tubes on it and run water trhough the tubes.
at least it would e a lot quiteter then the exisiting setup.
my link to my question about right copper
here.
perhaps i'll post pictures as i build it