Comparison of PowerColor Red Devil Radeon RX 6800 XT video card vs KFA2 GeForce RTX 2080 Ti Dual Black (1-Click OC) V2 video card by specifications and benchmarks. PowerColor Red Devil Radeon RX 6800 XT runs at 1.900 GHz+ 4 % base clock speed and has 16 GB of GDDR6 memory, while video card KFA2 GeForce RTX 2080 Ti Dual Black (1-Click OC) V2 runs at 1.350 GHz base clock speed and has 11 GB of GDDR6 memory. The TDP of the first video card is 300 W, and the second is 250 W. Compare the table of benchmark results to find out which graphic card is better.