In Raven Ridge Slides is clear that the coherent part of the uncore (of course in Raven Ridge all the access is coherent) takes memory clock*32 bytes of bandwidth.
Wel,,, the last rumor of Navi talks about how the GDDR6 speed is 12.8 Gbps and we have the rumor that PS5 GPU runs at 1.8 Ghz, of...