Comparison of GIGABYTE Radeon RX 580 Gaming 4G MI video card vs SAPPHIRE PULSE Radeon RX 6700 XT video card by specifications and benchmarks. GIGABYTE Radeon RX 580 Gaming 4G MI runs at 1.257 GHz base clock speed and has 4 GB of GDDR5 memory, while video card SAPPHIRE PULSE 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.