Original Gt540m Gt 540m 2gb N12p-gs-a1 Mxm 3.0 Laptop Video Graphics Card For Hp Envy 23 Omni 220/27 Touchsmart 420/520 - Laptop Motherboard - AliExpress
GeForce GT 540M vs GeForce 9800 GTX+
660498-001 HP Nvidia GeForce 540m 2GB Mxm3.0 Video Graphics Card