It is a inspiron 15z ultrabook with windows 8 and has 500 gb hard drive 5400rpm sata hdd and 32 gb mSATA SSD. It also has intel core i5. It's video card is an intel hd graphics 4000.
Almost any dedicated video card will still be better, but watch out because some while better are still not enough to make a game playable(newer games).
General rule is still anything is still better than onboard(at a cost to battery like when gaming.).
I played the game Just Cause 2 on an Intel HD 3000(slower than what you are looking at) setup before. low settings and lower resolution did make it playable. In the end, more eye candy needs more power.