Comparison of PowerColor Radeon RX 5500 XT 4G video card vs MSI Radeon RX 580 Armor MK2 8G video card by specifications and benchmarks. PowerColor Radeon RX 5500 XT 4G runs at 1.647 GHz+ 2 % base clock speed and has 4 GB of GDDR6 memory, while video card MSI Radeon RX 580 Armor MK2 8G runs at 1.257 GHz base clock speed and has 8 GB of GDDR5 memory. The TDP of the first video card is 130 W, and the second is 185 W. Compare the table of benchmark results to find out which graphic card is better.