Comparison of MSI Radeon RX 580 Armor 8G OC video card vs PowerColor Radeon RX 6800 Red Devil Limited Edition video card by specifications and benchmarks. MSI Radeon RX 580 Armor 8G OC runs at 1.257 GHz base clock speed and has 8 GB of GDDR5 memory, while video card PowerColor Radeon RX 6800 Red Devil Limited Edition runs at 1.850 GHz+ 9 % base clock speed and has 16 GB of GDDR6 memory. The TDP of the first video card is 185 W, and the second is 250 W. Compare the table of benchmark results to find out which graphic card is better.