The R2 adds 6th generation Intel processors, a choice of either the AMD Radeon R9 M470X or Nvidia GeForce 960 graphics cards, and support for Alienware's proprietary Graphics Amplifier. It also ships with Windows 10. Graphics Amplifier The Graphics Amplifier allows an Alienware laptop to run most full length (or smaller, non-hybrid) desktop GPUs. A proprietary PCIe 3.0 ×4 cable is used instead of the Thunderbolt 3 cable used on most other eGPUs . Laptops 18 inch M18x (Discontinued) - Introduced in 2011, it is considered a replacement for the original M17x design, but with a bigger chassis, a screen up to , dual MXM 3.0B GPU support, special keyboard macros, and up to 32GB of DDR3-1600MHz RAM. Shipped with Intel Sandy Bridge processors and the option of single or dual AMD Radeon 6870M/6970M/6990M Radeon HD 6000 Series GPU(s), single or dual Nvidia GeForce 500 Series GPU(s). Factory CPU overclocking was also an available option. M18x-R2 (Discontinued) - 2012 revision of the M18x; originally shipped with Intel Sandy Bridge processors, later shipped with updated with Intel Ivy Bridge processors, single or dual Nvidia GeForce 600 Series GPU(s), single or dual AMD Radeon HD 7970M Radeon HD 7000 Series GPU(s), up to 32GB of DDR3-1600MHz, and optional factory overclock. Alienware 18 (Discontinued) - 2013 refresh of the M18x; updated with Intel Haswell Processors, single or dual Nvidia GeForce 700 Series GPU(s), single or dual AMD Radeon R9 M290X GPU(s), and up to 32GB of DDR3L-1600MHz RAM, and 1TB RAID 0 SSDs along with facelift with new design. Marketed as "Alienware 18" but listed in some countries as "M18XR3 Viking". Alienware 18 R2 (2014) (Discontinued) - 2014 Updated version of the Alienware 18 or "M18x R3"; updated with Intel Haswell micro architecture processors, single or dual Nvidia GeForce 800 Series GPU(s), up to 32GB of DDR3-1600MHz, and optional overclock. Alienware 18 R3 (2015) (Discontinued) - 2015 version was a limited re-release of the previous Alienware 18, with updated dual Nvidia GeForce 900 Series GPUs and up to 32GB of DDR3L-1600MHz. 17 Inch M17x (Discontinued) - Introduced in 2009, it is the first laptop released by Alienware after the company was bought by Dell. The name and some of the design is based on the Alienware 17 inch laptop, the Alienware M17. M17x-R2 (Discontinued) - 2010 Revision of the M17x, adding support for Intel i5 and i7 processors, dual MXM 3.0B graphic cards.