I know what people usually says, don't... save your money. While they may be right, I got one of the best socket-478 system out there, I can play Supreme Commander just fine... no jitter... medium setting... large maps, no problem.
Industry leading Asus P4P800 SE mother of all motherboards for overclocking & tweaking.
2GB DDR 400 OC 415 stable at 2-3-3-6 timing
Had 4GB RAM but dumped it due to 32-bit limitations, upgrade to 8GB DDR 1600mhz later with Dual Quad Extreme. This is about efficiency and extreme stable overclock, 2GB super fast.
Intel P4 Extreme Gallatin-core Xeon MP 3.57Ghz Hyper-threaded stable.
Zalman 9500 Industry best air-cool Heatsink
Two Ultra High 3,800rpm blower with sealed tight Acrylic Case, w/ Tornado tunneling cooling technology.
BFG 7800 OC AGP 8x 256MB DDR graphics @ 460mhz overclocked & 1350mhz DDR3 overclocked, stable.
Idle temp 27C, max temp 41C.
Hyper-threaded is hardware based dual instruction per clock execution architecture, under Windows XP Pro, shows up as 2 logical CPUs, extremely efficient CPU w/ 2.5MB L2 & L3 cache. 20 stage pipeline.
Of course, Core 2 Duo now with 3.0Ghz+ are starting to kick my arse but hey, I got the best Socket-478 system out there and it HANGS with the latest games without a hiccup.... how many Socket-478 system can say that?! =)