Comparison of XFX Radeon RX 580 GTR XXX Edition 8GB Crimson video card vs PowerColor Red Devil Radeon RX 6800 XT Limited Edition video card by specifications and benchmarks. XFX Radeon RX 580 GTR XXX Edition 8GB Crimson runs at 1.257 GHz base clock speed and has 8 GB of GDDR5 memory, while video card PowerColor Red Devil Radeon RX 6800 XT Limited Edition runs at 1.900 GHz+ 4 % 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.