Out-of-the-box performance with Intel’s Core i7 processors Extreme Extreme overclocked speed to take on the toughest opponents Featured in powerful Stealth Blue anodized chassis with X-window side panel Intel® Core™ i7 Extreme processor 975 (3.33Ghz, 8MB L2 cache, 6.4GT/sec) Video Card Dual SLI 1.8GB NVIDIA® GeForce® GTX 295 Memory 12GB 1066 MHz Tri Channel DDR3 SDRAM [3x4096MB] Microsoft Operating System Genuine Windows Vista® Home Premium SP1 (64 BIT) - English