Comparison of MSI Radeon RX 580 Mech 2 8G OC video card vs MSI Radeon RX 580 Armor 4G OC video card by specs 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 580 Armor 4G OC runs at 1.257 GHz base clock speed and has 4 GB of GDDR5 memory. The weight is different, 842 g vs --. The TDP of the first video card is 185 W, and the second is 185 W . Compare the benchmark results to find out which video card is better.