Comparison of XFX Radeon RX 580 GTS XXX Edition 4GB video card vs PowerColor Radeon RX 6500 XT ITX 4GB 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 PowerColor Radeon RX 6500 XT ITX 4GB runs at 2.200 GHz base clock speed and has 4 GB of GDDR6 memory. The TDP of the first video card is 185 W, and the second is 107 W. Compare the table of benchmark results to find out which graphic card is better.