GTX 770 4GB Help

Titan of Canine

Honorable
Dec 23, 2013
4
0
10,510
Does the gtx 770 have access to all 4GB in a 4GB model(memory bandwidth wise)? I know a gtx 770 will not provide enough processing power to use 4gb, but can it in SLI, because The 770 has only a 256 bit memory interface, but the memory is a bit faster, giving it a bit more more bandwidth than a 680(224.3GB/second vs 192.2 GB/second)

My main question is if it is worth it to go with a 770 4gb(possible future SLI) and can it utilize more than 2GB VRAM. If so, how much?