Comparison of MSI Radeon RX 5500 XT Mech 4G OC video card vs PowerColor Red Devil Radeon RX 6800 XT Limited Edition video card by specifications and benchmarks. MSI Radeon RX 5500 XT Mech 4G OC runs at 1.647 GHz+ 2 % base clock speed and has 4 GB of GDDR6 memory, while video card PowerColor Red Devil Radeon RX 6800 XT Limited Edition runs at 1.900 GHz+ 4 % base clock speed and has 16 GB of GDDR6 memory. The TDP of the first video card is 130 W, and the second is 300 W. Compare the table of benchmark results to find out which graphic card is better.