i run a msi 970 gaming 4g and fo4 just tickels the 4g vram when it dose i drop in to the low 30's but almost never lower than 30 and this is at 4k ultra with some of the draw distances turned down. the hq ground textrue mod and the photo realistic wastland mod. witch is funny cause it looks better and runs better then stock lol beth. if i run the game at 1080p it pegs the vsync at 120. witch is the max for my vizio m65 at 1080p. I'm ok with the performance of the 970 in 4k and at 1080 its a monster very good card at its price point. I will say i really want a 980ti though, and if you wan it to last for years id say save for one of those. I should mention i have the 970 oc'ed to 1.528ghz on the gpu and 4ghz on the memory. the i5 is at 4ghz (on the stock cooler!) and the rams on the xmp 2400 profile(16gigs). *edit* i guess to sum it up you cant go wrong with the 970 but... that extra vram and gpu horsepower from the 980ti is hard to ignore (if you can swing it) right now i wouldn't bother with a 980, go 970 or 980ti. if nvidia would release a 970 with 5 or 6gigs of vram id get two of those in a heart beat.