Comparison of PowerColor Red Devil Radeon RX 6900 XT Ultimate video card vs MSI GeForce RTX 3070 Suprim 8G LHR video card by specifications and benchmarks. PowerColor Red Devil Radeon RX 6900 XT Ultimate runs at 1.825 GHz base clock speed and has 16 GB of GDDR6 memory, while video card MSI GeForce RTX 3070 Suprim 8G LHR 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 270 W+ 23 %. Compare the table of benchmark results to find out which graphic card is better.