Actually the frame rate did plummet. I hit 3030MB and performance canned it. I think Shadow Play running also contributed. But BF4 will use 2800MB+ with maximum settings when 3GB is available.
Anyone who thinks 3GB is enough for 4K is kidding themselves all the way to the bank.
For the record I'm using a 500GB RAID0 array of 2x Samsung 840Pros, no amount of SATA bus speed is going to compensate for GDDR5.
Exactly. I've been told by people on here who haven't run out of VRAM what happens when you run out of VRAM. They say it's a flat performance drop versus a similar card with available VRAM.
Nonsense. The game becomes completely unplayable as you constantly stream from the page file where the speeds are way down on GDDR5. It manifests in stuttering although I'd say it's more 'hitching' where the game will freeze momentarily, catch up to normal frame rate again and then hitch again.