Here is some detail from Alienware...
The Best Mobile Gaming Experience in the Universe
Attention to Detail: Crank up your in-game settings (AA/AF/Shadows) to experience every single aspect of the game without sacrificing performance. With up to 4GB of GDDR5 graphics memory, you'll have more graphics muscle than most desktop gaming rigs. If you demand even more power, select a choose dual-graphics solution powered by either NVIDIA® SLI™ or AMD CrossFireX™ technology.
High Definition Visuals: With the available 18.4" Full HD (1920x1080) backlit WLED display, you'll be able to crank up resolution on your favorite games or multimedia.
Relentless Power
Get desktop performance in a laptop-sized package. It’s the ultimate unfair advantage: the Alienware M18x laptop delivers the power you need to obliterate anyone or anything that stands in your way.
Overclocked to Overpower: Overpower your online enemies by upgrading to a factory-overclocked Intel®Quad Core™ i7 Extreme CPU to 4.0GHz featuring Intel® Turbo Boost Technology 2.0 for powerful performance and lightning speed.
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Advanced Memory Options: The Alienware M18x laptop comes locked and loaded with up to 32GB of DDR3 RAM at speeds up to 1600 MHz for the ultimate multitasking experience.
New Hybrid Hard Drives: It's a win-win situation for every gamer: the SSD performance you crave, with the HDD capacity you need. Are you looking for the colossus of hard drive options? Select an optional dual RAID 0 configuration for extreme performance.
One-stop Gaming and Entertainment Center
Go beyond gaming! Whether you want to watch movies, listen to music or connect with friends, the Alienware™ M18x lets you turn your gaming laptop into a home theater system, anytime you please.
Watch, Play, Connect: Hook up any compatible device with an HDMI output to your Alienware M18x or catch your favorite shows with an optional TV tuner and remote.
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Go Big: Enjoy intense 3D gaming by connecting to a compatible 3D TV via HDMI 1.4 or ditch the wires entirely. With optional WirelessHD you can wirelessly blast 3D or Full HD games to any 3D-ready device. 3D viewing requires additional equipment, sold separately.
Big Sound, Small Speakers: Get more immersive gaming than you ever expected from a laptop with audio powered by Klipsch®. Or, wake the neighbors with support for up to 7.1 Surround Sound Audio.
Command and Customize
Control and personalize your system from the user-friendly Alienware Command Center.
AlienFX™ Lighting Controls: Show your attitude! Choose from an array of color and transition effects and assign them to distinct zones, including the keyboard, touchpad and more. AlienFusion™ Power Management: You decide when you need maximum performance, or when to scale back power for less intensive applications. AlienTouch™ Touchpad Controls:Customize your touchpad’s sensitivity to prevent accidental contact, and activate virtual scrolling to enable vertical and horizontal scrolling with just a touch. AlienTactX™ Macro Key Controls: Let your keys do the clobbering. M18x comes with 5 programmable keyboard keys, for up to 15 distinct functions per application. Pre-Loaded and Ready to Own: Steam®, the popular digital distribution gaming software, can be pre-installed on your Alienware M18x laptop. Opt to have Eve Online, the popular sci-fi MMO, preinstalled as well so you can stop wasting time and start playing! Mark of the Conqueror: Laser cut and etched in metal for all time — your Alienware laptop comes with a custom engraved name plate. Mark your M18x with your name, clan, nickname or a threat of dismemberment to anyone that touches your system.