I have Hp pavillion dv5-2135dx. I checked the video card is ATI mobilty Radeon HD 4250 Graphics. I can play all sorts of game on this notebook but its not better performance. So i am thinking to change the graphics card. Is there any idea instead of ATI I can use NVIDIA or something like that? I dont know its sharing or not.
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You can't change video cards in that laptop. Or even most other laptops for that matter. It's AMD's version of integrated graphics, only much faster than Intels offerings at that time.
Yep unfortunately you can't change the GPU in your laptop. Only some that start around $1800 and are about 2'' thick can you change that out.