Alienware Graphics Amplifier (9R7XN) Amplify your performance Step up your graphics performance with support for a full-length, double-wide, desktop graphics card that do not exceed 10.5 inches in length Designed for Alienware 13 R2, 15 R2, 15 R3, Alpha R2, M17xR2, M17xR3, X51 R3, R2 notebooks LCD or on any external display connected to the amplifier Includes a 460 Watts internal power supply, GPU is not included, peripherals dock to the amplifer with four built-in USB 3.0 ports Plug in with a single proprietary cable, included in box, exclusively made for Alienware R2 laptops, it is a system bus extender, has stealth black color Compatibility for available GPUs compared to TBT3 options and offer support for a single full-length, dual-wide, PCI-Express x16 graphics card, support graphic cards of up to 375W and NVIDIA GeForce GTX 600 as well as AMD Radeon HD 5000 series and newer