Hello Alooter,

XPS 8700 is shipped with nVidia GeForce GTX 660. Which is 9.2" x 4.3" card. The system was never tested with the ASUS GTX 660. However, as it is a regular size desktop tower, the ASUS GTX 660should fit inside the XPS 8700 chassis. 

**Note: Upgrading this part is purely based on user's discretion. 

Hello Alooter,

I'm researching the exact same thing. It looks like there isn't enough room for a big graphic card. Did you ever installed the above graphic?

                                 Pipo816

It was a tight squeeze, but it DOES fit. After installing the drivers from the CD the graphics card comes with it works great. Never gets hot, and is very quiet. Turned the computer into a cheap little gaming rig

Alooter,

     So you have the XPS 8700 non special edition?

Yes, I have the regular version

Thanks!

I know that this thread is over a year old, but I purchased a Dell XPS 8700 Special Edition desktop which came with a Nvidia Geforce GTX 750 Ti graphics card and a 460 W power supply. I'm looking to upgrade to a 750 W power supply (which I already bought) and the new Nvidia Geforce GTX 980 graphics card. I'm also concerned about the size of the new graphics card. I have provided the dimensions of my current card and the one I want to upgrade to.

Current (GTX 750 Ti) Graphics Card Dimensions:                  New(GTX 980) Graphics Card Dimensions:

Height: 4.376in - 111.15mm                                                     Height: 4.376in - 111.15mm

Length: 6.7in - 170.18mm                                                        Length: 10.5in - 266.7mm

Width: Dual Slot                                                                        Width: Dual Slot

Please tell me if someone was able to fit a graphics card with similar dimensions into their Dell XPS 8700.

The card size is not a problem (you will need a longer SATA III cable to reach the hard drive from the motherboard). The real problem is compatibility with the motherboard which seems that Dell has solved and might soon release a Beta BIOS. I just went with building my own PC due to the fact that I can pick and choose all my parts and my time was running out on my Dell return period. I hoop you guys can get your new BIOS update soon.

Bigtoip26, did you have any luck? I'm hoping to upgrade my GPU as well, but I'm not sure what will fit. 

Thanks!