Comparison of XFX Radeon RX 580 GTR-S XXX Edition 8GB Crimson video card vs GIGABYTE Radeon RX 6900 XT Gaming OC 16G video card by specifications and benchmarks. XFX Radeon RX 580 GTR-S XXX Edition 8GB Crimson runs at 1.257 GHz base clock speed and has 8 GB of GDDR5 memory, while video card GIGABYTE Radeon RX 6900 XT Gaming OC 16G runs at 1.875 GHz+ 3 % base clock speed and has 16 GB of GDDR6 memory. The TDP of the first video card is 185 W, and the second is 340 W+ 13 %. Compare the table of benchmark results to find out which graphic card is better.