Comparison of MSI Radeon RX 570 Mech 2 8G OC video card vs XFX Speedster MERC 319 Radeon RX 6800 XT Black Gaming video card by specifications and benchmarks. MSI Radeon RX 570 Mech 2 8G OC runs at 1.178 GHz+ 1 % base clock speed and has 8 GB of GDDR5 memory, while video card XFX Speedster MERC 319 Radeon RX 6800 XT Black Gaming runs at 1.925 GHz+ 5 % base clock speed and has 16 GB of GDDR6 memory. The TDP of the first video card is 150 W, and the second is 300 W. Compare the table of benchmark results to find out which graphic card is better.