Comparison of GIGABYTE AORUS Radeon RX 580 4G video card vs GIGABYTE AORUS Radeon RX 6900 XT Master 16G video card by specifications and benchmarks. GIGABYTE AORUS Radeon RX 580 4G runs at 1.257 GHz base clock speed and has 4 GB of GDDR5 memory, while video card GIGABYTE AORUS Radeon RX 6900 XT Master 16G runs at 1.950 GHz+ 7 % 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.