I had two RX 480 s crossfired . GTA V was truely awesome , and I think from benchmarks I have seen it is at GTX 1080 levels or even above that . I didn ' t run with a FPS counter on but no stutters and very fluent in 4 k on very high settings . When it worked , it worked great . But for the rest , crossfire drove me mad . Weird flickering issues in alot of games , and then the games who did not support it at all . So now I have my first nVidia since 2003 . I honestly do NOT recommend multi GPU atleast untill DX 12 andor Vulkan mGPU gets widespread . I am active on the stockmarket trading AMD as well as nVidia , but as you can see on my flair I am not really helping at the moment . Both my Core i 7 920 and R 9 270 x shat themselves this year , waiting for Zen and Vega P .