Whoo these cooling systems are cool. :D I remember a few years ago when my dad took me to this computer warehouse that was full of computer stuff to buy. Thier was this stand with a computer on it and a resionably sized heatsink on the CPU, but it had two tubes going to it from a pump outside the computer. The tubes were filled with a green liquid, my guess would be radiator coolent. I cant remember the speed that it increased by. Anyway down hear in melbourne its quite cold we normally dont get 45C days, so the CPU in my computer dosent get too hot. The fan just came with the CPU so its just a standard fan, its currently going at 2.41Ghz. I can try to nuge it a bit harder to 3Ghz, but not to 4.16Ghz with a standard fan. The Mother board has a Spread Spectrum unit that stabalizes the main clock generators wave form, and is only needed at a high frequency. The most wierdest method of cooling your fan is putting a cup of liquid nitrogen on your CPU, I saw it on the net someware, must of been a test run because nitro would absorb the heat. Thier are some good heat transfer compounds like this one. http://www.arcticsilver.com/as5.htm Thier was also this super fan that I saw in a PCUSER magazine, i'll try and find it when I can. I'll give ya my results at running on 3Ghz. See ya.