My computer is a shuttle ST20G5. I know from a few sites that the 4800+ should be the fastest processor which runs on this model's MB, however, I now see that there are 2.4ghz ones built on the 90nm process, and 2.5's built on the 65nm. Obviously smaller is better in regards to heat, etc, however, will my motherboard suppport this (might have to flash the bios) as it is still socket 393... or should I go with the other one to be safe? Very confused..