What is a good graphics card?

I was wondering what would be a good graphics card to go with this build:
AMD A10-5800K 3.8GHz Quad-Core Unlocked APU/Gigabyte GA-F2A55M-DS2 mATX MB/8GB DDR3 1600 Patriot Viper Xtreme Memory/1TB WD Blue HDD/LG 24X DVDRW/TT V4 Black Mid Tower case w/500W PSU Barebones
i don't have a whole lot of money but if you can tell me one that is not too expensive but can still play games like assassins creed 4 battlefield minecraft sims 3 at medium setting if not high thank you

I recommend a GTX 760.

If you want a cheaper one, get a gtx 660. Lee's card and my card will run the games you listed at around high-ultra.

The graphics card you have in the APU and can probably play any of those games at pretty decent settings. But if you want a little more performance out of it I would recommend getting this r7 260x it is a great card and is on sale for a really good price.

http://www.newegg.com/...-_-Product