https://www.techradar.com/news/nvidia-geforce-rtx-cards-may-get-faster-ram-to-combat-amds-navi-gpus

AMD will soon be introducing new Navi graphics cards which are likely to be highly competitive offerings, and according to the graphics grapevine, Nvidia already has plans to counter this move with a refresh to its existing GeForce 20-series Turing products, bringing in faster memory for these GPUs.

The rumor – and we stress this is just a rumor, to be taken with all the usual caveats – comes from RedGamingTech, which cites sources claiming that Nvidia is planning to use faster video memory in its RTX cards (but likely not Turing GTX products), for a boost from 14Gbps to 16Gbps in terms of memory speed.