There is No Doubt That Nvidia Is the Leading Company.
Nvidia Provides Wide range of Application Support,
Nvidia's Key Feratures:
1) nvidia PhysX (It Provides Gr8 realism in games with PhysX Programming AI is much Greater)
2) SLI technology (U can Use Up to 3 Monitor to 1 GPU Card & Can Create
3 way SLI With Stereoscopic 3D viewing )
3) Stereoscopic 3D Technology NVIDIAŽ 3D Vision Surround technology (You Dont Need 3 Monitors Only 120Hz LCD or LED can create Full HD 1080P game play in 3D !!!

)
4) DirectX 11 tessellation performance(incredibly detailed environments and characters.)
5)nvidia Cuda Technology( accelerate the most demanding tasks such as video transcoding, physics simulation, ray tracing, and more, delivering incredible performance improvements over traditional CPUs. )
5)32X anti-Aliasing technology
6)nvidia pure video FullHD(The combination of high-definition video decode acceleration and post-processing that delivers unprecedented picture clarity, smooth video, accurate color, and precise image scaling for movies and video. )
7)Open-GL 4.1
8)pixel Shader Lavel 5.1
& Yes U Don't have to pay thousands of Dollars To Get All Of these
u can get all Of these tech. starting Price From $100.
nVidia Also Provides Gr8 After Sales Service also with Periodic,
drivers Update for life time.
my first Graphic card was 9400GT @ $50 it really lacks when I play Games like Prototype, But now the same Old graphic card can play Dead Space 2 & singularity Type 4 times greater graphics games Smoothly just With a Latest update's From Nvidia!!!!!!
nvidia Really Kick *** Of ATI

My System Config.
LG D2342P 23" LED Cinema 3D Monitor
Core 2 Quad Q6600 2.4Ghz X 4.
Intel DG43RK
4GB DDR3 @ 1333Mhz
1TB Seagate Baracuda
nVidia GeForce GT550TI 1GB GDDR5
Creative Sound Blaster 5.1VX
Creative Inspire 5.1 T6060 Home Theater