Sorry, this item is not available anymore for purchase online. Please see our recommended replacement product.
Accept the challenge.
Pure processing power. Alienware X51 packs options including the powerful 3rd Gen Intel® Core™ i7 processor: The brains leading you to epic new victories. Find Out More
You've got speed. Run several high-end applications with ease. Alienware X51 offers up to 8GB of high-performance dual-channel DDR3 memory.* Find Out More
Release your potential.
There are always new obstacles to face and new challenges to conquer, and Alienware X51 will be with you every step of the way.
A small system hides big entertainment power. Whether standing vertically or laying horizontally, Alienware X51 turns virtually any living space into a world of high-end entertainment possibilities. Find Out More
Build. Modify. Adapt. 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 extinct. Find Out More
Take command of your game domain.
Alienware Command Center software features a powerful suite of customization options to make your X51 your own. Don't just play a game. Play your game.
The new AlienAdrenaline feature enables Game Mode, which lets you give each of your games a unique profile on your system. Disable unnecessary programs and activate your music player when you launch one game, or bring up key Web links when you launch another.
AlienFX® System Lighting Technology gives you access to a variety of themes and 8,000 distinct lighting combinations, so you can personalize as much as you like. Customize your system with game themes that respond to many in-game events with unique lighting effects to complete your immersion.
AlienFusion power management controls allow you to configure your settings in order to maximize performance and efficiency while managing power usage. Crank up the settings for hardcore gaming and resource-intensive tasks, or scale it back for running everyday programs.
Accessories: At Dell™.com, you'll find a vast arsenal of electronics and accessories designed to enhance your gaming and multimedia experience, including headsets, keyboards and mice.
Services: Whether you have technical questions or simply need help setting up your new PC, you can count on Dell™. Choose from our menu of no-hassle PC services — from everyday troubleshooting to long-term support.
Awards & Reviews
From drivers and manuals to diagnostic tools and replacement parts, Dell Product Support has you covered.