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Alienware X51 Gaming Desktop

Total versatility. Endless possibility.

All the power you want in any room you choose. Connect to your monitor or big screen TV and enjoy full PC gaming performance.
Alienware X51 Desktop
  • Intel® Core™ i3-3220 (3MB Cache, up to 3.3GHz)
    Intel® Core™ i5-4430 (6MB Cache, up to 3.2GHz with Turbo Boost Technology)
    Intel® Core™ i7-4770 (8MB Cache, up to 3.9GHz with Turbo Boost Technology)
Operating Systems
  • Windows 10 Home
Video Card
  • 1.0GB GDDR5 NVIDIA® GeForce® GTX 6454 (Standard)
    1.5GB GDDR5 NVIDIA® GeForce® GTX 6604
    2.0GB GDDR5 NVIDIA® GeForce® GTX 6704
  • 6GB DDR3 at 1600Mhz (Standard)
    8GB Dual Channel DDR3 at 1600Mhz
    16GB Dual Channel DDR3 at 1600Mhz
Hard Drive
  • 1TB (64MB Cache) 7200 RPM SATA 6Gb/s3 (Standard)
    2TB (64MB Cache) 7200 RPM SATA 6Gb/s3
    256GB SSD SATA 6Gb/s + 1TB (16MB Cache) 5400RPM SATA 3Gb/s3
  • Chassis Dimensions & Weight
    Front-Height: 13.504” (343mm)
    Rear-Height: 12.54” (318.5mm)
    Depth: 12.52” (318mm)
    Width: 3.74” (95mm)
    Starting at Weight” 12.1lbs (5.49 Kg.)

    External Chassis Connections
    (2x) SuperSpeed USB 3.0
    (1x) Microphone In
    (1x) Headphone/Speaker Out

    (1x) On-board HDMI 1.4 Output
    (1x) RJ-45 Gigabit Ethernet
    (2x) Hi-Speed USB 2.0
    (4x) SuperSpeed USB 3.0
    (1x) Front Left/Right Speakers
    (1x) Center Speaker
    (1x) Rear Left/Right Speakers
    (1x) Side Left/Right Speakers
    (1x) SPDIF Digital Output (TOSLINK) (1x) SPDIF Digital Output (Coax)

    Internal Chassis Connections
    (3x) SATA 6.0Gb/s Ports
Optical Drive
  • Slot-Loading Dual Layer DVD Burner (DVD±RW, CD-RW) (Standard)
    Slot-Loading Dual Layer Blu-ray Reader (BR-ROM, DVD±RW, CD-RW)

  • Memory Slots
    2x 240-Pin DDR3 SDRAM Slots

Dimensions & Weight
  • Height (front): 343mm (13.504"); Height (rear): 318.5mm (12.54") x Width: 95mm (3.74") x Depth: 318mm (12.52")
    Weight: 5.49 kg (12.1lbs)
  • Chipset
    Intel® H87 Express Chipset (Standard)

    Color Options
    Matte Stealth Black with Dark Chrome Accents (Standard)

    Dimensions & Weight
    Height: Front: 13.504" (343mm) Rear: 12.54" (318.5mm)
    Depth: 12.52" (318mm)
    Width: 3.74" (95mm)
    Starting Weight: 12.1 lbs. (5.49 kg.)

    Motherboard Class
    Mini-ITX Motherboard

    Processor Cooling
    Alienware™ High-Performance Air Cooling


    Alienware Command Center

Features & Design

Operating System
Available with Windows 11 or Windows 10 – get the best combination of Windows features you know and new improvements you’ll love.
Windows 10
The best Windows ever for gaming is here.
Purchase your system today, upgrade for free, and experience PC gaming at its best with Windows 10 Home.

DirectX 12 -
Break down boundaries and step into your game with graphics more stunning than ever before with the new DirectX 12 technology. Windows 10's API is armed with new features that will provide quicker processing in real time to generate higher FPS and richer graphics as well as reduced power consumption to play longer.

Expand your community - Xbox app lets you see what your friends are playing now, chat with your community, and track your scores and achievements. Plus, Game DVR* lets you record your best hero moves for sharing with friends.

Play more games - The greatest Xbox games are now at your fingertips, and you will get built-in support for the Xbox controller* and even stream Xbox One games to a
Windows 10 Home PC, laptop, or tablet anywhere in your home. Even the cross-device barriers are down – start a game on your PC and move to your Xbox to continue playing.

Start menu - Back and improved. You will be an expert from the get-go since your windows Start menu is back in an expanded form. Plus, all your pinned applications will carry over so your experience is familiar, productive and better than ever.

The speed you need - Windows 10 Home starts up and resumes fast so there's no buffer between you and your game. Even your updates reach you as soon as they are available so you always have the latest and greatest features.
Alienware X51
Versatile design. Optimal Performance. Mind-blowing performance, visuals, and sound Upgrade and customize your machine

Whether you choose to display your Alienware X51 vertically on your desk as a token of victory or horizontally to optimize your gaming space, you’ll have more than enough performance to satisfy your gaming needs.

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Gaming, movies and other images jump off the screen with the optional powerful NVIDIA® GeForce® GTX 960 graphics card, Full HD, 3D and Blu-ray capabilities of the Alienware X51. For those seeking a system that can handle high-performance video and audio content creation, look no further than Alienware X51.

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Play your way, now and in the future. With the ability to upgrade standard desktop components, Alienware X51 is engineered to help you boost your gaming and entertainment experience at any time and dominate games well into the future. For your real-time modifications, Alienware X51 is armed with Wi-Fi and ample front and rear I/O ports (including a total of 8 USB ports ) to provide complete peripheral customization to fit your very own winning strategy.

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Victory is yours
Victory is yours
The key to any victory is preparation. With the Alienware X51, you can now play any game you want with the high-performance 4th Gen Intel® Core™ processors, powerful graphics up to 175 W, PCI-Express x16, and storage you need to overwhelm your opponents now and into the future.

The optional GeForce® GTX™ 960 delivers incredible performance, power efficiency, and cutting-edge gaming technologies that only NVIDIA Maxwell™ technology can offer. This is the perfect upgrade to advanced gaming, letting you dominate the competition with 60% faster performance and twice the power efficiency than previous-generation cards*.

*Compared to GeForce GTX 660

Find Out More
Gaming and more
Gaming and more
The Alienware X51 is a powerful PC ready to not only take on your fiercest gaming challenges, but whatever else comes your way. Email, shopping and social networking are a breeze on the X51.

Bring your Alienware X51 to life with AlienFX™ and experience another level of immersion with Alienware’s exclusive in-game lighting technology that provides lighting effects to alert gamers of specific in-game events and special effects. 100+ games and apps support AlienFX™ today.

Advance in your journey with confidence when equipped with the Alienware X51 and its perfect balance of high performance and compact size.
Ultimate control. All from one place.
Take control of the game. And feel the intensity. The redesigned Alienware Command Center 4.0 lets you choose lighting and special effects, accelerate your gaming performance, monitor in-game results, and more — all in one hub.
  • AlienAdrenaline  
    Launch games your way with personalized shortcuts in Game Mode, maximize performance with the new Accelerator feature, and keep an eye on resource consumption with Performance Monitoring. Find Out More
  • AlienFX  
    AlienFX system lighting
    Create custom lighting and special effects to suit your unique gaming style. Apply 20 different colors to 3 different zones for 8,000 color combinations. Find Out More
  • AlienFusion  
    Access your system’s power-management controls so you can decide when you need maximum performance or when to scale back for more everyday programs. Find Out More
Alienware X51
First generation vs. New Alienware X51 Gaming Performance
First generation vs. New Alienware X51 Gaming Performance
The chart above shows how far the performance has evolved on the Alienware X51 from its first generation launch on January 2012 to the current generation. Using 3DMark 2011 Extreme as a benchmark, you can see how the overall gaming performance has increased by up to 467%.
Overall Processor and Graphics Performance
Overall Processor and Graphics Performance
We’ve taken some of the key configurations offered and collected the 3DMark Vantage CPU benchmark scores and 3DMark for Windows Fire Strike scores to show a comparison of how performance increases by configuration with a focus on CPUs and GPUs, respectively.
Real-time In-game Performance
Real-time In-game Performance
Using some of the major titles out there today like Bioshock Infinite and Tomb Raider we were able to use their built-in benchmark tools to measure how many frames per second the Alienware X51 can generate using the key configurations. Even with our lowest end configuration, the Alienware X51 can produce up to 41 frames per second at a resolution of 1920 x 1200.
Ports and Slots
Ports and Slots
1. Optical S/PDIF Port | 2. Coaxial S/PDIF Port | 3. HDMI Port | 4 . SuperSpeed USB 3.0 Ports | 5. Hi-Speed USB 3.0 | 6 . RJ-45 Gigabit Ethernet | 7. SuperSpeed USB 3.0 Ports | 8. Side L/R Surround Port | 9. Rear L/R Surround Port | 10. Center/Subwoofer LFE Port | 11. Microphone Port | 12. Line-out Port | 13. Line-in Port | 14. Discrete Graphics Card | 15. Power Adapter Port | 16. Slot Loading Optical Drive | 17. Microphone In | 18. Headphone/Speaker Out | 19. SuperSpeed USB 3.0 Ports
Dimensions & Weight
Dimensions & Weight
Front-Height: 13.504” | Depth: 12.52” | Width: 3.74” | Starting at Weight: 12.1 lbs (5.49 Kg.)
Your content. Anywhere, anytime.
Put your stuff in Dropbox and get to it from any device. Dropbox lets you edit docs, share photos, and show off videos from anywhere. Even if something happens to your PC, your stuff is always safe in Dropbox. Get 20GB of Dropbox space included for a year with your purchase of a new Dell PC.*

*Dell consumer PC or select Venue tablets

Accessories & Support

Essential accessories for your Alienware X51
Essential accessories for your Alienware X51
Complete your Alienware X51 with any combination of Alienware TactX™ accessories and Alienware Vindicator bags designed to enhance and protect your gaming experience.

Ratings & Reviews


Drivers, Manuals & Support

Product Support
Product Support
From drivers and manuals to diagnostic tools and replacement parts, Dell Product Support has you covered.

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