Comparison of GIGABYTE Radeon RX 580 Gaming 8G video card vs XFX Speedster SWFT 309 Radeon RX 6700 XT Core Gaming video card by specifications and benchmarks. GIGABYTE Radeon RX 580 Gaming 8G runs at 1.257 GHz base clock speed and has 8 GB of GDDR5 memory, while video card XFX Speedster SWFT 309 Radeon RX 6700 XT Core Gaming 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.