Apple has quietly released a new graphics card option for the Mac Pro, effectively bringing down the cost of equipping the workstation with GDDR6 VRAM. Called the Radeon Pro W5500X, the half-height MPX module is based on AMD's RDNA architecture and has a memory bandwidth of 224 GB/s.
https://www.notebookcheck.net/Apple-brings-the-AMD-Radeon-Pro-W5500X-to-the-Mac-Pro.479511.0.html