Comparison of ASUS Radeon RX 5700 video card vs XFX Speedster MERC 319 Radeon RX 6800 XT Black Gaming video card by specifications and benchmarks. ASUS Radeon RX 5700 runs at 1.465 GHz base clock speed and has 8 GB of GDDR6 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 180 W, and the second is 300 W. Compare the table of benchmark results to find out which graphic card is better.