Comparison of ASRock Radeon RX 6600 XT Challenger D 8GB OC video card vs KFA2 GeForce RTX 2080 HOF video card by specifications and benchmarks. ASRock Radeon RX 6600 XT Challenger D 8GB OC runs at 2.000 GHz+ 2 % base clock speed and has 8 GB of GDDR6 memory, while video card KFA2 GeForce RTX 2080 HOF runs at 1.515 GHz base clock speed and has 8 GB of GDDR6 memory. The TDP of the first video card is 160 W, and the second is 215 W. Compare the table of benchmark results to find out which graphic card is better.