Cooler Master CM690
Gigabyte EP45 UD3R
Intel Core 2 Quad Q8200
Western Digital Green Power 1TB + Seagate 80GB
HIS HD 4670 Turbo
Kingston Hyper X DDR2 800 (2X1GB)
GIGABYTE ODIN GT 550W
I advice you direct upgrade to 2GB X 1 ram better. Because in future if you upgrade, you need to consider about your old RAM. Future 2GB X1 will more cheap then 1GB X 2. Some more the new Windows 7 is resource hungry OS.