The games I played before used more VRAM than I thought. According to GPU Z recording everything, I use 4.7GB or higher for games like BF4, FC4, and DA: Inquisition, but I never really had any major issues when I was limited to 4GB. I did have some fps drop issues though, although I thought that might be causes by throttling even though my GPU was below the thermal limit before throttling, now it might have been because of VRAM (Just guessing/assuming).