Gtx 960 vs r9 270x 4gb

[Varzoh]

I was originally gonna get the r9 280 but some people said my psu isnt good enough so should i get the r9 270x 4gb or gtx 960?
Pc Specs:
Motherboard: 970a-ds3p Gigabyte
Ram: 8 gb Corsair
Power Supply: 500 Watt EVGA
Graphics Card: r9 270x XFX
Processor: FX 6300
Also I think my motherboard is only for and AMD gpus and cpus so could I even get the gtx 960 to work with my build? Thanks

 

[CTurbo]

The 960 is faster and would be easier on your psu. I wouldn't run a 270x on that psu either. Yes the 960 is compatible with your motherboard.

 

[cilliers]

Motherboard only supports crossfire. Therein lies the difference. Will do 1x nVidia card, but not SLi. Will however do 2x AMD cards. A previous reader mentioned how the R9 270x 4gb or GTX 960 are incremental upgrades over your existing R9 270X. He was absolutely right. You're looking at 10-15% performance increase either way. Those are going to be pretty expensive fps'es. LOL