Comparison of XFX Radeon RX 580 GTS XXX Edition 4GB video card vs MSI Radeon RX 6800 XT video card by specifications and benchmarks. XFX Radeon RX 580 GTS XXX Edition 4GB runs at 1.257 GHz base clock speed and has 4 GB of GDDR5 memory, while video card MSI Radeon RX 6800 XT runs at 1.825 GHz base clock speed and has 16 GB of GDDR6 memory. The TDP of the first video card is 185 W, and the second is 300 W. Compare the table of benchmark results to find out which graphic card is better.