If you want one of the most powerful PCs without having to bother about over-clocking ("a build yourself PC" all parts fit together):
ASRock P45R2000 (Intel Socket 775 motherboard)
Corsair CMPSU-750TXEU 750W (ATX power supply.. perhaps a bit over-powered)
Intel Core 2 Duo E8500 3,16GHz Box (Intel Socket 775 CPU)
RAM DDR2 PC6400/800MHz CL5 2x2GB (memory)
NZXT Hush HU-001 (Miditower chassis)
ATI Radeon HD4870 X2 2GB (GPU)
Samsung SH-S223F (DVD-burner)
Seagate Barracuda 7200.11 ST3500320AS 32MB 500GB (3,5 inch S-ATA HD)







