right now i have a 3000+ Winchester that runs stock at 1.8Ghz and i have it oc'd to 2.4GHz right now. 1GB of DDR400 ram, Sapphire X800GTO2 at 16 pipes and 535/600 and its on a ASRock DUAL939-SATA2... i think im getting another 7200rpm 8mb cache 160GB SATA drive for xmas so i should be running raid by the 26th... now my question is.... what do i need now? what is my bottleneck.. my only guess is that im running out of ram since after i play FEAR online for about 30 minutes, if i go into the room in the Factory that has teh wet floor sign and the one medipack it starts jerking whenever it has to render the lighting for the ceiling.... any suggestions taken 
