Comparison of PowerColor Liquid Devil Radeon RX 6900 XT video card vs KFA2 GeForce RTX 2080 SUPER HOF 10th Anniversary Black Edition video card by specifications and benchmarks. PowerColor Liquid Devil Radeon RX 6900 XT runs at 1.825 GHz base clock speed and has 16 GB of GDDR6 memory, while video card KFA2 GeForce RTX 2080 SUPER HOF 10th Anniversary Black Edition runs at 1.650 GHz base clock speed and has 8 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.