Amazon.com: Valley Of The Sun New for NVIDIA GeForce GTX 580M GDDR5 2GB Graphics Video Card for Alienware M15X R1 R2 M17X R1 R2 R3 M18X R1 Gaming Laptop, MXM 3.0B VGA
NVIDIA GeForce GTX 580M claims world's fastest laptop GPU title
NVIDIA Releases GeForce GTX 580M and 570M, Brings Optimus to Hardcore Gaming Laptops - PC Perspective
Original GTX 580M GTX580M 2GB N12E-GTX2-A1 Video Card For Dell Alienware M15X M17X M18X Graphic Card GPU Replacement Tested Well - AliExpress
Success: NVIDIA GTX 580M SLI on Alienware M17x-R2 Laptop