GIGABYTE GeForce GTX 770 OC - 4GB GDDR5

VS

XFX Radeon R9 290 Core - 4GB GDDR5



I wanna run 5x wow clients in LFR with decent FPS, that means atleast 60fps on main char, at lowest quality, (expect "Projected Textures & Particle Density)

I know the graphic is my problem, so the question is, which one of thise will be best for me?

Just say (770 or R9) in the chat, there is no reason to detail ur suggestion, but only apply if you know what you are talking about, thx.