How to choose a gpu for my pc

[shakirck]

I want a gpu for my computer.my resolution is 1366x768.
I want to play latest games .....

my budget is 100$.

 

[RaDiKaL_]

try to find a HD7790 under 100$, else a GTX 650 (non Ti) should be around the same price, for that resolution these cards should do just fine on latest games.

 

[Beezy]

7790 with 2GB is the best best if you can manage another 20 bucks or so. Otherwise id says a 7750.
http://www.newegg.com/Product/Product.aspx?Item=N82E16814125455
or
http://www.newegg.com/Product/Product.aspx?Item=N82E16814125454

the extra GB of Gddr5 RAM is def worth that 20, and its a better GPU