my original card is a built in Sis Mirage Graphics 32mb. i need the best Pci-e card that will work on 350w power supply. ONLY FROM AMAZON PLEASE *For gaming afcourse if u need more info on my computer everything is here: http://pastebin.com/VX8BAwwv my screen res is 1920 x 1080, but i always stay on 1680 x 1050 =/
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an ATI 5670
if you think your PSU is solid enough, you can try the ATI 5750. I suggest at least 20a on your 12v.
4650 DDR3, 4670, or 5670
For your cpu, i think HD5670 is more than enough... And make sure you get 2.0 version.