Just installed one of Zalmans ZM80-HP GFX card heatpipe coolers. I can now hear no nosie from my PC at all and the heatpipe seems ok so far, only been running for 5mins. Very happy at the moment. I am using a GF4 Ti4400 128Mb, also Zalman flower (with Zalman 92mm fan) on an AMD Athlon XP2000+, Seagate Barracuda IV 80Gb HDD, generic 350W Aopen ATX+12V PSU and 2 case fans directed at GFX and other PCI cards (both 80mm, one QuietPC and one Papst). The noiseist part of my PC is now the Pioneer DVD-Rom drive (106S). I am happy.