
Introducing the AMD Radeon RX 6000 Series graphics cards, featuring the breakthrough AMD RDNA 2 architecture, engineered to deliver powerhouse performance for all gamers. The AMD Radeon RX 6000 Series graphics cards power a new generation of competitive and 4K gaming with vivid visuals, and elevated experiences in every game and every frame.
A: Take a look at "Tom's Hardware GPU Benchmarks Hierarchy" which does a good job comparing cards/chips backed by detailed testing. Practically, the 6900 XT and the 3080 Ti are comparable, with the 6900 XT doing a decent amount better over the 3080 Ti at 1080p resolution. At 4k, the 3080 Ti is a negligibly better. Cost and thermal load may be your tie-breakers. Compared to a 3060 (non-Ti), the 6900 XT is insanely better.
Q: Is this the Merc 319 Limited Black or Merc 319 Black and Ultra?
A: No, it is not in the MERC series, it is SWFT series. Check XFX website to find difference.
A: I think this model has been modified perhaps cache to interface with the the GDD6. Other than that they raise the price because they can!