Amazon.com: Valley Of The Sun 4GB Graphics Video Card GPU Upgrade Replacement, for Alienware M15X M17X M18X R1 R2 R3 R4 Gaming Laptop, NVIDIA GeForce GTX 680M GDDR5 MXM VGA Board Original
Amazon.com: Valley Of The Sun 4GB Graphics Video Card GPU Upgrade Replacement, for Alienware M15X M17X M18X R1 R2 R3 R4 Gaming Laptop, NVIDIA GeForce GTX 680M GDDR5 MXM VGA Board Original