looking for a graphic card ranging b/w 7000 to 10000 on which i ca play gta 4 and cod black ops 2 comfortabley , ram 3gb, intel core 2 duo 2.53 ghz
and yes can i play gta 4 with my existing graphic card which is Intel(R) 82945G Express Chipset Family
Ok first of all, your Intel intergrated graphics isn't a graphics card.
What is your price range in USD?
You might be running a 32-bit OS.
For a game like GTA 4, your processor is just alright, not the best by any means though.
You asked if you could run GTA 4 in your title. You said that you could run GTA 4 in your post.
I'll take it as if you could run it at max settings.
If you buy a gaming grade graphics card you need a PSU that supports it.
If your computer came with just intergrated graphics, your motherboard may not even have a PCIe slot.
If I were you, i would do a little more research for the time being, than ask a valuable question.