I also used arctic silver thermal paste and my temps dropped from 60C idle (65 load) to 45 idle (50 load), the temps dropped 15 degrees! This HSF is totally quiet compared to my last HSF which had a 7000 rpm fan on it. The only complaints that I would have is the installation was difficult, I simply couldn't attach the retaining clip with the motherboard still in the case. But, once I removed it, it was a piece of cake. This thing is MASSIVE, I had to take the rear exhaust fan on the case and swap it to the outside for clearance. It also barely cleared my PSU by about 1/4 of an inch. Worth every penny.