With support up to 32GB (which they would probably implement in their next TITAN or Tesla)! They also introduced NVlink which enables up to 8-way-multi-GPU Sli!
And this is what the whole PCB with everything on it would look like:
Dimension: 140mm x 78mm
However, not every single Pascal GPU would launch with HBM2 as it’s more expensive and it has some production problems for such high demand. Nvidia claimed that they would launch their low-end and mid-tier GPUs (Something like the 960 and the 950) in GDDR5X which is a modified GDDR5 module that offers double the bandwidth but of course can’t reach the insane 1TB/s of the HBM2.
But the greatest most confusing question that everyone is asking right now… What would be the new GPU names? GTX 1080? That would be ugly. Maybe a GTY? Still ugly. Perhaps a GDX or a HTX. No one knows yet…