Comparison of MSI Radeon RX 580 Mech 2 8G OC video card vs MSI Radeon RX 590 Armor 8G video card by specifications and benchmarks. MSI Radeon RX 580 Mech 2 8G OC runs at 1.257 GHz base clock speed and has 8 GB of GDDR5 memory, while video card MSI Radeon RX 590 Armor 8G runs at 1.469 GHz base clock speed and has 8 GB of GDDR5 memory. The TDP of the first video card is 185 W, and the second is 220 W-2 %. Compare the table of benchmark results to find out which graphic card is better.