I think now the heat for Mem is not a problem any moresince I add a home-made memory cooling system for this guy. i find the abit k8vpro 2 mem slots are so close to each other. the inside heat is hard to be blowed off. I use an old coolermaster cpu fan to attach on the memory, and a small cable to fasten it. now even @275Mhz full load for memory, i can not feel it warm when i use hand to tough it( of course, i need to clear the static first by touching the casing :-).) if you are insterested my work, i can take a photo of it, after i finish that i feel the cpu temp is also affected--cooled down by around 8-10 degree. now for the system since i will not oc the cpu further and the heat is not a problem for memory, i believe any instability is caused the hardware physical quality and bios settings (also maybe the microsoft OS disability but yet i have not tested the pc under linux or solaris). now the pc sometimes hangs when playing games @275*9 v cpu@1.55 mem@2.80. I think maybe it is caused by the nvidia drive (more...)