This amplifier came with my Alienware R17 laptop but I won't be using it. I have opened the box, but it is unused and still fully wrapped. The following is from the website:
Enhance the intensity.
Transform your Alienware 13, 15 and 17 R2 & R3 notebooks and X51 R3 desktop with the Alienware Graphics Amplifier and unlock the immersive power of enhanced gaming performance.
Amplify your performance: Step up your graphics performance with support for a full-length, double-wide, desktop graphics card.
Hook up your favorite displays: The graphics amplifier allows you to enjoy the performance of the desktop graphics card on your Alienware 13, 15 and 17 R2 & R3 notebooks LCD or on any external display connected to the amplifier.
Plug into a battle station: The Alienware Graphics Amplifier connects to your notebook with a single cable enabling the PCI-Express graphics card connection as well as your four USB 3.0 ports to be connected with less clutter and simple connectivity.
Unlock the new world of VR gaming on your notebook: By increasing your graphics performance the Alienware Graphics Amplifier can unlock the exhilarating world of VR gaming on your 15 & 17 notebooks and X51 R31.
Check the Dell website for product compatibility: