Could I put a graphics card in this system?

[Kootchy]

Hey all,
I was wondering if i could put a gfx card in this computer, I was thinking a gtx 660 or 670 when they go down in price next year or could you suggest a decent card to use, because I will be getting it 2013 so most/all cards now I could probably afford.

Thanks 😀

 

[Kootchy]

Forgot the link 😛
http://www.ebay.co.uk/itm/AMD-TRINITY-A10-5800K-4-2GHZ-QUAD-CORE-ATI-7660-8GB-1TB-HOME-GAMING-PC-COMPUTER-/180986550722?pt=UK_Computing_DesktopPCs&hash=item2a23a399c2