Installed the NV Silencer on my 6800 GT tonight. Installation went pretty much according to instructions, except that they have replaced the tube of thermal paste with a pre-placed pad for the GPU, and don't mention this in the instructions. I spent about ten minutes looking around the floor under my desk for the damn tube.
Seems to have taken about 10 deg. c off the idle temps. Much quieter.
Seems to have taken about 10 deg. c off the idle temps. Much quieter.