Well, after trying to overclock my processor with my old Zalman 7000A-AlCu and it getting too hot. I got a Thermaltake Tower112 heatsink. Despite it's tremendous size, it's 3lb heavyweight title, it's cheap side stickers. It's one hell of a cooler. I don't know whether it's the heatpipes or the pure copper, the Arctic Silver 5, or just the Vantec Tornado 90mm fan that I toned down to make it quieter, but I achieved a 600mhz overclock to 2.6ghrz and I idle at 37c. My specs are: AMD64 3200+ 939 90nm MSI K8N Neo2 Platinum 1GB 512MBx2 OCZ EL Platinum Rev.2 Seagate 120GB SATA HD Ati-Radeon X800Pro OCed to XT-PE Sound Blaster Audigy 2 Platinum Thermaltake Tower112 Heatsink Vantec Tornado 90mm NEC 16x DVD Drive BenQ DW1620 16xDVDRW DL Thermaltake Xaser II Silent Purepower 480W PSU Antec Aluminum Windowed Case. Logitech Wireless Freedom Joystick Logitech MX1000 Laser Mouse Saitek Gamers Keyboard/Pad Combo Creative Inspire 5500 6.1 Speakers With the speed I have now, I'm sure I could push it further, but I don't think that's necessary at the moment. That made my day.