Comparison of MSI Radeon RX 6700 XT MECH 2X 12G video card vs XFX Speedster MERC 319 Radeon RX 6900 XT Limited Black Gaming video card by specifications and benchmarks. MSI Radeon RX 6700 XT MECH 2X 12G runs at 2.321 GHz base clock speed and has 12 GB of GDDR6 memory, while video card XFX Speedster MERC 319 Radeon RX 6900 XT Limited Black Gaming runs at 2.150 GHz+ 18 % base clock speed and has 16 GB of GDDR6 memory. The TDP of the first video card is 230 W, and the second is 300 W. Compare the table of benchmark results to find out which graphic card is better.