I'm in the process of building a retro gaming rig:
ASRock 4CoreDual-VSTA LGA775
QX6800 Core2 Quad Extreme 2.93GHz
2x1GB OCZ Dual Ch. DDR2 6400 667MHz
Gigabyte Radeon HD 4650 1GB AGP
128GB SATAIII Samsung SDD
Evga 750w G3 Modular PSU
Everything works fine with an old generic 400w PSU w/...