Re: amd athlon 64 vs. intel pentium 4
Yep, pretty much what BigLu said. AMD 64 cpus get more done in a clock cycle compared to their Pentium 4 counterparts. More work in less time equals lower frequency ( ie like 2.0ghz). AMD 64 cpus are more for gaming, and Pentium 4's are more for multimedia. However if you have a decent P4 like the 630, coupled with a nice mobo, and a good graphics card like the 7900gtx or 1900xtx, you'll have a great gaming machine.
Rig -- Emachines T5026, 3.06ghz P4, 300W Bestec PSU, 160 sata hd, 512mb dual channel 3200 ram @ 3-3-5-8, ATI Radeon 9250 pci, dual layer 16x dvd+/-rw.