It would be nice if we'd know what graphics card you are using. VRAM isn't the only thing that matters.
VRAM, while mattering, actually matters less than the GPU itself.
There are GT and GTX graphic cards which have 2GB VRAM. But it's from a whole new league.
Though, I think that any GPU with 2Gb VRAM is pretty decent nonetheless.
Any particular genre, OP?