I got a Intel I5 2320 3.0 Ghz and 8 Gb of ram and have a free PCI slot for a graphics card. I want a graphics for $150 that could run most of the new games and upcoming games like:
Call Of Duty Modern Warfare 3
Need For Speed The Run
and upcoming games like GTA 5 and Call Of Duty Black Ops.
I wouldn't feel somewhat comfortable recommending you any more than a 6670 or 7750 here how they preform http://www.anandtech.com/bench/Product/613?vs=614& The Radeon HD 7750 is the fastest graphics card you can get right now that doesn't require an auxiliary power input; it draws all that it needs from a 16-lane PCIe slot.