Hey this is a great running alienware x51,it has been modded to run a full size desktop graphics card it currently has a gtx 760 in it,Hdd drive had to be removed as I couldn't get alienware respawn to work and didn't want any of my data to get into the wrong hands.

You would want to upgrade to a ssd anyways with new age games which can easily be done with an adapter.

The case has the attenae for a wifi card but the wifi card had been removed to fit the full size graphics card I always used a USB wifi adapter but you could easily put a new wifi card in it depending on the graphics card you use

Again runs great but will need a hard drive also need an power supply to run the full size graphics card you can use any computer power supply that gives sufficient power for the card you decide to use