In my opinion the Alienware X51 is better prepared for games
Designed in SFF - Small Form Factor, the X51 is a machine that comes to fill a gap between desktops and gaming consoles.
The X51 is the perfect addition to your home theater. With HDMI and Blu-Ray drive outputs, you have in a single device, the most complete multimedia center.
Can also be used with up to 2 displays simultaneously via HDMI + DVI output
This machine is equipped with 4a. generation chipset Intel i7-4770, 3.90ghz, 8gb 1600mhz dual channel DDR3 RAM, nVidia GeForce GTX 760ti GPU with 2.0GB GDDR5 dedicated memory.