Comparison of MSI Radeon RX 6600 XT MECH 2X 8G video card vs Gainward GeForce RTX 3070 Phantom GS video card by specifications and benchmarks. MSI Radeon RX 6600 XT MECH 2X 8G runs at 1.968 GHz base clock speed and has 8 GB of GDDR6 memory, while video card Gainward GeForce RTX 3070 Phantom GS runs at 1.500 GHz base clock speed and has 8 GB of GDDR6 memory. The TDP of the first video card is 160 W, and the second is 270 W+ 23 %. Compare the table of benchmark results to find out which graphic card is better.