Originally posted by Oneup
Don't fool yourself.
R9 390 and GTX 970 and pretty much neck-in-neck in performance at 1080p. R9 390 has better performance at higher resolutions due to the extra VRAM. On the GTX 970, once you go over 3.5GB VRAM, the last 0.5GB runs slower and you will experience stutters in games. I once played Skyrim with heavy mods on my GTX 970 and I experienced stutters like a bitch.
R9 390X vs GTX 980. The GTX 980 will beat the R9 390X in most games, but there are some games that the R9 390X win in. In the games the the GTX 980 win, you'll get around 5-10 extra FPS. Woohoo, 5-10 extra FPS! But look at the price of a GTX 980 versus a R9 390X.
In lower-end budget PCs, you almost always see AMD cards being recommended.
In recent DX12 tests, AMD GPUs surpass NVIDIA GPUs.
In areas where it gets cold, AMD GPUs can also be used as heaters.