what are the differences between the x 2.6 and the x3 chip, i know most there is to know about the x3 but i dont really have any idea what features the X2.6 has, Is it a sort of "lite" version of the X3? and do it use the X2 or X3 bios (that might be a stupid question but i like to know all i can) I'm trying to get a chip for my friend and trying to save him a few dollars so i want to know what im getting before i buy it