Comparison of ASUS Radeon RX 6800 XT video card vs MSI Radeon RX 6500 XT MECH 2X 4G OC video card by specifications and benchmarks. ASUS Radeon RX 6800 XT runs at 1.825 GHz base clock speed and has 16 GB of GDDR6 memory, while video card MSI Radeon RX 6500 XT MECH 2X 4G OC runs at 2.200 GHz base clock speed and has 4 GB of GDDR6 memory. The TDP of the first video card is 300 W, and the second is 107 W. Compare the table of benchmark results to find out which graphic card is better.