Comparison of PowerColor Red Devil Radeon RX 6600 XT video card vs ASRock Radeon RX 6600 XT Challenger D 8GB OC video card by specs and benchmarks. PowerColor Red Devil Radeon RX 6600 XT runs at 2.188 GHz+ 11 % base clock speed and has 8 GB of GDDR6 memory, while video card ASRock Radeon RX 6600 XT Challenger D 8GB OC runs at 2.188 GHz+ 11 % base clock speed and has 8 GB of GDDR6 memory. The weight is different, -- vs 640 g. The TDP of the first video card is 160 W, and the second is 160 W . Compare the benchmark results to find out which video card is better.