hd 7790, same gpu as in the xbox one apparently. Fairly good for hd gaming. Was kind of restricted by my old low capacity psu, and when I was buying the hd 7790 was better for power usage than the Nvidia rival card.
Am feeling a very strong urge to upgrade from my 7 year old i7 920 box (it's a dell motherboard so I can't over clock), I dithered over a 'scratch and dent' dell outlet alienware area 51 r2 box (5820, 16 gb ram 120 gb ssd 2 tb sata, gtx 980, 1.5k psu for 1150 quid roughly) for too long and it went, which I'm a bit pissed off about (was slightly out of budget, but it's about 500-600 cheaper than similar systems).