Comparison of XFX Radeon RX 580 GTR XXX Edition 8GB Crimson video card vs SAPPHIRE Radeon RX 6700 XT 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 SAPPHIRE Radeon RX 6700 XT runs at 2.321 GHz base clock speed and has 12 GB of GDDR6 memory. The TDP of the first video card is 185 W, and the second is 230 W. Compare the table of benchmark results to find out which graphic card is better.