Except benches show that 2gig is plenty for even 5760x1080 surround on the few sites that have done those, and definitely fine for 2560x1600/below (i.e. any single-monitor setup). The only clear thing for those looking at the facts is that 2gb is perfect for the GTX 680 GPU barring the exceptional circumstance that one has three 30" panels for 7680x1600, which I have only ever seen a handful of people even claim to have let alone post pictures of.
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