Comparison of ASRock Radeon RX 6600 Challenger D video card vs KFA2 GeForce RTX 3070 EX (1-Click OC) LHR video card by specifications and benchmarks. ASRock Radeon RX 6600 Challenger D runs at 1.626 GHz base clock speed and has 8 GB of GDDR6 memory, while video card KFA2 GeForce RTX 3070 EX (1-Click OC) LHR runs at 1.500 GHz base clock speed and has 8 GB of GDDR6 memory. The TDP of the first video card is 132 W, and the second is 220 W. Compare the table of benchmark results to find out which graphic card is better.