PC BUILD: r9 270x or gtx 760

SoI'm building my gaming pc, gotta finish in a few days, looking if I should purchase r9 270x or gtx 760. A guy who's building it said that the r9 270x will be better because he will upgrade its software or whatever. Please answer thanks, and can they both run GTA 5, Battlefield, minecraft, COD

Who cares

Gtx 760 is better than r9 270X… I will buy this PC the next month… So have an idea…
AMD Bulldozer FX-8320
MSI 970A-G43 AMD
MSI N760-2GD5/OC
Corsair Vengeance-8GB Dual Channel DDR3 Memory Kit (2x4gb)
Corsair 600W Gaming
Antec KUHLER BOX AP
Western Digital Caviar Black - WD1003FZEX
Gigabyte GZ-ZE2 ATX Casing/Or any cheap gaming Casing

R9 270x requires 10 more Watts to operate: 170W vs 180W. The GTX has better memory bandwith, but the R9 270x has better pixel rate. However, the GTX 760 has better texel rate, which makes it better at anisotropic filtering. The price/performance ratio of the R9 270x is so much better. You should get the R9 270x because it is much cheaper and it does not make much of a difference because they have similar benchmarks.

The gtx 760 is more comparable to the r9 280 non x version so its a bit more powerful than the r9 270x. Heres some benchmarks you can look at. http://www.anandtech.com/show/7503/the-amd-radeon-r9-270x-270-review-feat-asus-his/9
As you can see if you look at that it really depends on the game some are more optimized for one card brand or another.