Can anybody please suggest me which one is better Nvidia or ATI ?
I want to buy such a graphics card on which GTA 4 runs smoothly at the higher resolution ?
Please also name the graphics card model number !!!!
for gta 4 you'll need a 3+ ghz quad core(preferably intel's sb core i5 2400 or higher) cpu, 8+ gb ddr3 ram(system memory). that game is a poorly coded console port.
then, a good midrange gfx card or higher. may be a radeon hd 6850 or nvidia's gtx 560 or 560 ti - any of these cards will let you play any game smoothly.
it all comes down to your specs, budget and preferences.