I don't see how this is related to ED VR in any way lol, but since i said that, i might also say that I have GTX 1080 GamingX and i can play ED in 4k ultra ... so anything more than 1080 would be overkill. Ok i have surface thingy in mid somewhere, that surface loading and very rarely i get lag spikes down to 40-50fps, but 96% of the time i have stable 60fps.
VR works perfectly fine too, stable 90fps with VR ultra settings.
Also I always have ShadowPlay in shadow mode (meaning that it records 24/7). Give it 5 more years and graphics card upgrades for 1080p will be useless. In fact my old GTX 980 HoF can already run anything in 1080p ultra ... forget 1080p, i was playing in 1440p most of the time, but it was struggling with 4k in most games.