Comparison of ASRock Radeon RX 6800 Challenger Pro 16G OC video card vs PowerColor Red Devil Radeon RX 6900 XT video card by specifications and benchmarks. ASRock Radeon RX 6800 Challenger Pro 16G OC runs at 1.750 GHz+ 3 % base clock speed and has 16 GB of GDDR6 memory, while video card PowerColor Red Devil Radeon RX 6900 XT runs at 1.825 GHz base clock speed and has 16 GB of GDDR6 memory. The TDP of the first video card is 250 W, and the second is 300 W. Compare the table of benchmark results to find out which graphic card is better.