Comparison of MSI Radeon RX 580 Armor 8G video card vs XFX Radeon RX 590 Fatboy Core Edition 8GB video card by specifications and benchmarks. MSI Radeon RX 580 Armor 8G runs at 1.257 GHz base clock speed and has 8 GB of GDDR5 memory, while video card XFX Radeon RX 590 Fatboy Core Edition 8GB 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 225 W. Compare the table of benchmark results to find out which graphic card is better.