Comparison of GIGABYTE Radeon RX 5500 XT OC 8G video card vs ASUS ROG Strix Radeon RX 580 video card by specifications and benchmarks. GIGABYTE Radeon RX 5500 XT OC 8G runs at 1.607 GHz base clock speed and has 8 GB of GDDR6 memory, while video card ASUS ROG Strix Radeon RX 580 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.