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
ASUS GT 540M 2 GB Specs | TechPowerUp GPU Database
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
Download and install NVIDIA NVIDIA GeForce GT 540M - driver id 495494