Comparison of PowerColor Red Devil Radeon RX 6900 XT video card vs Gigabyte GeForce RTX 2060 Windforce OC 12G video card by specifications and benchmarks. PowerColor Red Devil Radeon RX 6900 XT runs at 1.825 GHz base clock speed and has 16 GB of GDDR6 memory, while video card Gigabyte GeForce RTX 2060 Windforce OC 12G runs at 1.470 GHz base clock speed and has 12 GB of GDDR6 memory. The TDP of the first video card is 300 W, and the second is 185 W. Compare the table of benchmark results to find out which graphic card is better.