Comparison of ASRock Radeon RX 5600 XT Challenger D 6G OC video card vs PowerColor Red Devil Radeon RX 6600 XT video card by specifications and benchmarks. ASRock Radeon RX 5600 XT Challenger D 6G OC runs at 1.420 GHz+ 26 % base clock speed and has 6 GB of GDDR6 memory, while video card PowerColor Red Devil Radeon RX 6600 XT runs at 2.188 GHz+ 11 % base clock speed and has 8 GB of GDDR6 memory. The TDP of the first video card is 160 W, and the second is 160 W. Compare the table of benchmark results to find out which graphic card is better.