Asus Crosshair 2 Formula
AMD Phenom 2 X4 940 BE
4GB G.Skill DDR2 1066
Sapphire Radeon HD3870
NexusTek RX-7000 700W
7200RPM 320gb WD
not much but will get me a nice FPS on cod. now before you ran that im using a Radeon card on a SLI ready mobo, i am going to upgrade the card to a double 550TI for SLI. this gpu im getting is my friends and he needs to get rid of it and i need a temporary one.
getting 4gb of 1066 is your biggest problem, the going rate of that used is $50 or so right now it's quite expensive. If you settled for 800, you could pick some up for $30ish if you waited it out for a good deal.
But for what you are going to have in it, yeah it's a capable gaming setup. The GPU is definitely the bottleneck, even in the newer COD games it will struggle. What resolution are you on? BUT, even with a single gtx550 Ti it will blast through all COD games with ease.
However, I would stay on the lookout for a gtx460. It smashes (lol) the gtx550 Ti for about the same price (both used are going for $90-100 or so). Even the 768mb is way stronger and very cost affective.