Is it possible to change my graphic card? I've a G500 Lenovo laptop?

So i'd like to know if its possible for e to change my laptop's graphic card.
Laptop specs are -

4GB Ram.
2.40 Ghz
Windows 8 - 64 bits
Current Graphic card - Intel HD 4000 graphics.

Any type of answer will greatly be appreciated.

No. The Intel HD 4000 graphics are the built-in graphics on the CPU. Since the CPU on laptop's can't be upgraded, neither can the graphics.

Not this model the lenovo y400 and y 500 series has a ultra bay for sli a plug in graphic card with the onbroad graphic card