One thing we know for sure is that Big Navi is coming. AMD has not kept this a secret, even going so far as to say it will be a halo product. How it will fare against Ampere remains to be seen, but make no mistake, AMD has every intention of competing at the high end of the graphics market. The question is, will Big Navi arrive with HBM2e

Source: Hot Hardware – Will AMD’s Radeon Big Navi Next-Gen GPU Use HBM2e Or GDDR6 Memory?