Comparison of MSI Radeon RX 580 Armor MK2 8G video card vs Sapphire Pulse Radeon RX 580 4G G5 video card by specifications and benchmarks. MSI Radeon RX 580 Armor MK2 8G runs at 1.257 GHz base clock speed and has 8 GB of GDDR5 memory, while video card Sapphire Pulse Radeon RX 580 4G G5 runs at 1.257 GHz base clock speed and has 4 GB of GDDR5 memory. The TDP of the first video card is 185 W, and the second is 185 W. Compare the table of benchmark results to find out which graphic card is better.