I am building a new system and am ready to order the processor. It will be either a XP 64 3000 or 3200. I am not sure yet. My question is what is the real difference between the standard 939 and 939 90nm. I read a little bit on what the 90 nm is about, but what is the real world opinion? I am using a EPOX EP-9NDA3J board. Which would be better for me and why?