Ultimate X Magnum Extreme The Extreme Edition, with MS XP or Vista Ultimate, is based on Intel’s Quad Core QX6850 Processor (1333MHz FSB). Housed in Gigabyte’s 3D Mercury with a Built-In liquid cooling system, it also boasts of 1.3KW of raw power from ABS Certified Tagan PSU. Gaming will never be the same with this beast as it has a dual ATI Radeon HD 2900XT in a Crossfire mode. 2GB of DDR3 1600 Dual Channel Memory seals the deal for this Dream Machine. Starting at $3,199.00, there is no Gaming Rig better, pound-per-pound.