Comparison of MSI Radeon RX 6600 XT MECH 2X 8G V1 video card vs ASUS Radeon RX 6800 video card by specifications and benchmarks. MSI Radeon RX 6600 XT MECH 2X 8G V1 runs at 1.968 GHz base clock speed and has 8 GB of GDDR6 memory, while video card ASUS Radeon RX 6800 runs at 1.700 GHz base clock speed and has 16 GB of GDDR6 memory. The TDP of the first video card is 160 W, and the second is 250 W. Compare the table of benchmark results to find out which graphic card is better.