Why does AMD have so many different versions of the 2.4 MHZ CPU's. They have the 3400, 3700, 3800, 4000, and of course the X2 4600 and 4800. I have the 3400, but I'm building a new computer and I'm probably going to get the X2 4800. I sthere a significant difference between all these to justify so many, for instance is the 4000 that much better than my 3400 other than socket 939. If i was to go from the 3400 to the 4000, would i even notice a difference? I just happened to notice all the different versions of the 2.4 MHz processor and thought I'd ask the question. :?: