Mehul_Mishra
Sorry, but you are operating under a misunderstanding. Your PC is a laptop and, unlike desktops, it does not use graphics "cards".
Instead, it uses graphics "modules" -- and what makes these different is that they involve the graphics chip being soldered to the system board. This means you have to take the entire PC apart to replace the system board just to change the graphics chip.
This would have to be done at an HP Service Center-- which means it will easily cost you several hundred dollars, possibly more than replacing the laptop in its entirety!
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