Comparison of ASUS Expedition Radeon RX 570 OC video card vs XFX Speedster MERC 319 Radeon RX 6800 Black Gaming video card by specifications and benchmarks. ASUS Expedition Radeon RX 570 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 Black Gaming runs at 1.850 GHz+ 9 % base clock speed and has 16 GB of GDDR6 memory. The TDP of the first video card is 150 W, and the second is 250 W. Compare the table of benchmark results to find out which graphic card is better.