i had no stability issues on xp64 here. i once bought it to run 64bit lightwave version but since i didnt need that much ram effectively and because it was slightly slower than 32 version i put it on another pc i made 4 my girlfriend. it still runs stable there, but: it lacks a lot of drivers, a lot 32bit soft doesnt work on it (or at least i couldnt get it to) and some minor features like photoshop thumbnails annoyingly do not want to work properly. so maybe there is somthing wrong with ur system? did u check the ram cell per cell with memtest for instance?
