OK, I have the Arctic Silencer NV5 rev. 3 installed on my 7900gt. When I first installed it, I got temps of 41c idle overclocked to the max WITHOUT voltmodding. I have voltmodded it and have the clocks at 705 core and 830 ram. My idle temp now for core is between 48c and 50c. I have replaced the paste with arctic silver and, on the backplate, have put something under it so that it is tighter on the core. Can anybody tell me what's going on? I have heard about a fan rpm mod. What is that? Thanks!