Comparison of PowerColor Radeon RX 6800 XT video card vs Gainward GeForce RTX 3070 Phoenix GS video card by specifications and benchmarks. PowerColor Radeon RX 6800 XT runs at 1.825 GHz base clock speed and has 16 GB of GDDR6 memory, while video card Gainward GeForce RTX 3070 Phoenix GS runs at 1.500 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 240 W+ 9 %. Compare the table of benchmark results to find out which graphic card is better.