Hi Dale, I've just read a review of a 64bit machine in 3dWorld. It uses the Gigabyte K8NPro board they also used windows 64 and I have to say they were less than enthusiastic, to quote... "We were disturbed to note that the operating system is highly optimised for the ultra expensive Intel Itanium processors, with no mention whatsoever of any support for AMD processors. Worse still the FX-51 {AMD's chip} is not compatible with the Itanium instruction set, so it derives no benefits from those optimisations." There were a load more issues, like not being able to install 3dsMax on windows XP64. They have a site, http://www.3dworldmag.com but I'm unsure wether the reviews on it. If you need anything else from the review just say.