Comparison of Sapphire Pulse Radeon RX 5500 XT 4G video card vs XFX Radeon RX 580 Double Dissipation 8GB video card by specifications and benchmarks. Sapphire Pulse Radeon RX 5500 XT 4G runs at 1.607 GHz base clock speed and has 4 GB of GDDR6 memory, while video card XFX Radeon RX 580 Double Dissipation 8GB runs at 1.257 GHz base clock speed and has 8 GB of GDDR5 memory. The TDP of the first video card is 135 W+ 4 %, and the second is 185 W. Compare the table of benchmark results to find out which graphic card is better.