There's a reason that model is known as the "Windtunnel" Never dealt with them myself, but I know there used to be DIY kits to replace the power supply and cooling fans and make them quieter. > Hi all, > > About 6 months ago, I upgraded my G4 MDD single 1.25 GHz (running 10.5.8) with a Sonnet DP 1.6 GHz card. I noticed some speed improvement, barely enough to justify the price (about $175). But I noticed the fans were working overtime like they've never done before. Loud. I installed Temperature Monitor and the CPU temps were over 62 c. After a while and some research I installed CHUD and placed it into NAP mode, which lowered the temps drastically and silenced the fans. But it too often now froze when not in use. I need to find a way to cool the computer so as not to use NAP. Has anyone ever installed the copper heatsink from a 1.42 processor to the 1.6? Does it fit and does it lower temps? Any fan mods the people can recommend? Anything else? Thanks. > _______________________________________________