Comparison of GIGABYTE Radeon RX 5700 8G video card vs XFX Radeon RX 6800 video card by specifications and benchmarks. GIGABYTE Radeon RX 5700 8G runs at 1.465 GHz base clock speed and has 8 GB of GDDR6 memory, while video card XFX Radeon RX 6800 runs at 1.700 GHz base clock speed and has 16 GB of GDDR6 memory. The TDP of the first video card is 180 W, and the second is 250 W. Compare the table of benchmark results to find out which graphic card is better.