That's the thing Nvidia is using 10GBPS GDDR5X which appears to early run RAM,and the lowest officially listed is 12GBPS GDDR5X.
So,I can see a refresh with faster RAM,coming round the corner.
That means a refreshed GTX1080 would have more bandwidth than a GTX980TI!!
Edit!!
I expect Nvidia will hold back to see what Vega is like.
Not sure if the 1080 actually uses 12Gb/s chips clocked at 10Gb/s, or if the ones on the 1080 are rated lower, but I read that the Zotac card is clocked at 11.3Gb/s, so that looks like they might be 12Gb/s. I don't really like OCing memory more than a small amount (as that usually seems to be the thing that will cause problems etc), so hopefully the custom cards come with 11-12Gb/s. If they come at 11-11.5GB/s then that will be 352-368Gb memory bandwidth which is pretty damn good.
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