Comparison of MSI Radeon RX 5500 XT Mech 8G video card vs XFX Radeon RX 580 GTS Black Edition 8GB video card by specifications and benchmarks. MSI Radeon RX 5500 XT Mech 8G runs at 1.607 GHz base clock speed and has 8 GB of GDDR6 memory, while video card XFX Radeon RX 580 GTS Black Edition 8GB 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.