Pentium Dual cores are far from obsolete right now, many people have them, they're cheap, overclock like crazy and they run relatively cool considering that they're sometimes OCed to almost twice their rated speed, also, if he gets an Intel based combo, the memory speed won't matter as much as it will probably be bottlenecked by his FSB anyway, 667MHz RAM (1333MHz FSB) is plenty fast enough with an Intel based system, my 800MHz RAM is downclocked to 667MHz right now as we speak...