I was told the memory bandwidth of 4gb gtx 670 and 680 cards is too low to take advantage of much more than 2gb of vram rendering the rest useless. This seems like almost too devious of a move by the companies endorsing these cards so I am just asking if anyone knows this is true or not. If it is that is a dick move by galaxy, gigabyte, asus, and pretty much every leading gpu seller.