Comparison of PowerColor Red Devil Radeon RX 6600 XT video card vs MSI GeForce RTX 3090 Suprim X 24G video card by specifications and benchmarks. PowerColor Red Devil Radeon RX 6600 XT runs at 2.188 GHz+ 11 % base clock speed and has 8 GB of GDDR6 memory, while video card MSI GeForce RTX 3090 Suprim X 24G runs at 1.395 GHz base clock speed and has 24 GB of GDDR6X memory. The TDP of the first video card is 160 W, and the second is 420 W+ 20 %. Compare the table of benchmark results to find out which graphic card is better.