Hi, Bhavin_Ahir,
Thank you for visiting Sony Community!
We recommend contacting the nearest Sony Authorized Service Center in your area for any hardware-related concerns especially replacing the graphics of your Sony Vaio SVF15212SN/B.
For further assistance regarding your concern, please contact the Sony offices/Sony representative offices nearest to your place of residence in Asia Pacific region http://www.sony-asia.com/countryselector.html?hpid=countryselector:AsiaPacific. Due to proximity, they are in a better position to respond to your questions or concerns.
Regards,
Vincent
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