<b>Accept the challenge.</b><br>Operating System: Windows® 7 Home Premium<br><br><b>Pure processing power.</b><br>Alienware X51 packs options including the powerful 3rd Gen Intel® Core™ i7 processor: The Brains leading you to epic new victories.<br><br><b>You've got speed.</b><br>Run several high-end applications with ease. Alienware X51 offers up to 8GB of high-performance dual-channel DDR3 memory2.<br><br><b>Release your potential.</b><br>There are always new obstacles to face and new challenges to conquer, and Alienware X51 will be with you every step of the way.<br><br><b>A small system hides big entertainment power.</b><br>Whether standing vertically or laying horizontally, Alienware X51 turns virtually any living space into a world of high-end entertainment possibilities.<br><br><b>Build. Modify.

Adapt.</b><br>With Alienware X51, desktop component upgrades are a breeze. From CPU and graphics cards to HDD and memory, you can keep your components up to date when other machines go e