Pede bai pero dako kaayo trabaho. Then e-resolder pa ang new GPU nimo. You need to buy pod a mobile GPU which is most likely mahal kaayo. Nya tan-awon pa if mo support imong laptop mobo, power requirements etc etc. For short, gg time yataps ka. Better buy a new laptop with a faster GPU.
Optional means imo ma customize ang laptop nimo before you buy it. If napalit na nimo then wala naka mabuhat ana.