If i add more RAM, will it boost up my gpu's preformance?

i just purchase my ASUS K43SM laptop it has 4gb of ram and nvdia geforce GT 630M 2GB, i tried to install some games like crysis 2 to test if it will run in high settings, but sometimes it lags, i'm planning to add another 4gb of ram thinking that it may boost up my gpu's memory,,
thank you
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