Comparison of Sapphire Toxic Radeon RX 6900 XT Limited Edition (rev 2.0) video card vs KFA2 GeForce RTX 2080 Ti HOF video card by specifications and benchmarks. Sapphire Toxic Radeon RX 6900 XT Limited Edition (rev 2.0) runs at 1.825 GHz base clock speed and has 16 GB of GDDR6 memory, while video card KFA2 GeForce RTX 2080 Ti HOF runs at 1.350 GHz base clock speed and has 11 GB of GDDR6 memory. The TDP of the first video card is 400 W+ 33 %, and the second is 250 W. Compare the table of benchmark results to find out which graphic card is better.