It uses a standard ATX power supply so it will fit. I would get a modular unit for a case that small if I was you though. I have a hard time with cable management with my 750TX in a full tower Antec 1200. For the price you can't beat this.http://www.newegg.com/Product/Product.aspx?Item=N82E16817151119
80 Plus Gold certified and modular Seasonic G series 550w for $90. It's one of the best units on the market.
9.6/10 + recommended buy from jonnyguru.http://www.jonnyguru.com/modules.php?name=NDReviews&op=Story6&reid=323
HardOCP Gold award.http://hardocp.com/article/2013/01/09/seasonic_gseries_g550_power_supply_review/9
Hardwaresecrets Golden award.http://www.hardwaresecrets.com/article/Seasonic-G-550-Power-Supply-Review/1683/13
You are fine with any single GPU with this including a GTX 680/HD 7970. Overclocking the whole system included.