Comparison of PowerColor Red Devil Radeon RX 6900 XT Limited Edition video card vs GALAX GeForce RTX 2070 SUPER EX Gamer Black Edition video card by specifications and benchmarks. PowerColor Red Devil Radeon RX 6900 XT Limited Edition runs at 1.825 GHz base clock speed and has 16 GB of GDDR6 memory, while video card GALAX GeForce RTX 2070 SUPER EX Gamer Black Edition runs at 1.605 GHz base clock speed and has 8 GB of GDDR6 memory. The TDP of the first video card is 300 W, and the second is 215 W. Compare the table of benchmark results to find out which graphic card is better.