The high-performance PC maker claims that CrossFireX is the first quad-GPU gaming platform to support DirectX 10.1.
The PC uses two ATI Radeon HD 3870 X2 graphics cards, each housing two GPUs and a full 1GB of dedicated graphics memory, making 2GB of dedicated GDDR3 graphics memory.
"Alienware is extreme high-performance PC gaming, and expectations are never higher than when dealing with the ALX CrossFireX, our most sophisticated desktop system," said Brian Joyce, senior vice president at Alienware.
ATI's Catalyst software allows users to 'unlock' the GPU controls to manually set the engine and memory clocks for overclocking and performance boosts.
Temperature displays and VPU recover safety features make it easier to maintain the system, while an auto-configure utility option overclocks to a preset stable speed.
Rick Bergman, senior vice president at AMD's Graphics Product Group, said: "CrossFireX allows for more immersive gaming than before, giving gamers the ability to play at high resolutions and settings with great performance."
The ALX CrossfireX is available from £3,557.
Molybdenum ditelluride is a two-dimensional material that can be easily stacked into multiple layers to create a memory cell
New light-guiding nanoscale device can control and monitor a nanoparticle trapped in a laser beam with high sensitivity
Optical traps are scientific instruments in which a focused laser beam is used to exert an attractive or repulsive force on a microscopic object to hold it in place
Scientists estimate that the exoplanet has already lost up to 35 per cent of its mass over its lifetime
The observations were made using the Atacama Array in the Chilean desert