What he said for before going over 3.5gb and after going over 3.5gb. Frycry 4 was the best and still had stuttering above 3.5gb, where as others went from smooth to unplayable.
from the post
Watchdogs
Battlefield 4
Farcry 4
SHADOW OF MORDOR
Really shows that it should be thought of as more of a 3.5gb card than a 4gb card, as is the same sort of stuttering you get when you run out of VRam on a normal card. Having 3.5gb isn’t much of a problem right now for a single card, but in the future you will get more and more into vram and the problem will present it’s self more and more.
If you don’t mind it being a 3.5gb card, being lied to by nvidia, and spending more to get lower power usage then get the card. But you can get a quiet, fast R9 290 or 290x with 4gb of vram for less than a 970.