Despite it’s small size the X51 will deliver an immersive experience when playing modern games and will also make a great entertainment hub, as you would expect there’s plenty of optional upgrades available to choose from, but as standard it will cost you $699.

The $699 model features an Intel Core i3 processor, the Intel H61 Express chipset, NVIDIA GeForce GT 545 (1GB GDDR5) graphics, 4GB of DDR3 RAM, a 1TB SATA HDD (7200 RPM), Windows 7 Home Premium, a dual-layer DVD burner, 7.1 audio, a 240 WATT Alienware PSU, Ethernet, WiFi b/g/n, 6 x USB 2.0 ports, 2 x USB 3.0 ports and HDMI 1.4 out. As previously mentioned the form-factor is very small, it measures in at 343mm x 95mm x 318mm and it weighs just 5.49KG – we have embedded a couple of images from Dell’s press release below.

In terms of optional hardware upgrades, there’s lots to choose from. Firstly if the Core i3 processor doesn’t meet your requirements there’s Core i5 and Core i7 options available (no-matter what you choose you will get a 2nd-gen Intel Core I processor), also you can get better smoother graphics by choosing the NVIDIA GeForce GTX 555 (1GB GDDR 5) GPU and improve overall performance by upgrading to a maximum of 8GB of DDR3 RAM. Finally it’s worth knowing that you can replace the DVD writer with a Blu-ray disc reader (there’s only one 5.25 inch bay for optical drives) and perhaps upgrade to a 330 WATT Alienware PSU.

If you head over to Dell.com you can take a closer look at the X51′s design and specifications, like other Alienware desktops there will be access to the Alienware Command Center software where you can configure power management, lighting effects and unique gaming profiles.

Do you think more gaming PCs should utilize smaller form-factors?