AMD Launches 3 High-End RX 6000-Series GPUs For 4k Gaming. The new GPUs are, according to #AMD, all capable of running games at 4k60fps at ultra settings. They will all have 16 GiB RAM and a 128 MiB cache. Prices range from $579 to $999. There is already some support for these cards in Linux 5.9 and Mesa 20.2.0. That support may or may not be close to feature-complete.
https://linuxreviews.org/AMD_Launches_3_High-End_RX_6000-Series_GPUs_For_4k_Gaming