I'm planning to upgrade my Sony Viao to make it more gaming compatible since I bought it 3 years ago. I'm keeping the cd/dvd drives, hardrive, and sound cards to save some money since they won't affect performance and I won't have to reinstall everything. I've already decided on the E6400 Duo http://www.newegg.com/Product/Product.asp?Item=N82E16819115004 and I'm planning on 2gigs of ram, this Corsair DDR2 675 seemed like a good price, only $200 after MIR http://www.newegg.com/Product/Product.asp?Item=N82E16820145015 I have no idea which motherboard to get though and I was thinking of getting a Radeon X1600 Pro video card which seems pretty reasonable right now, but I'm not sure if theres something better @512MB around the $200 range. Besides that, I probably need to upgrade my power supply to 500W and in terms of a fan I have no idea if I need a new one or not? Any advice on motherboard, video card, powersupply/fan is appreciated, thanks.