Comparison of Sapphire Radeon RX 5700 8G video card vs XFX Radeon RX 590 Fatboy 8GB video card by specifications and benchmarks. Sapphire 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 590 Fatboy 8GB runs at 1.469 GHz base clock speed and has 8 GB of GDDR5 memory. The TDP of the first video card is 180 W, and the second is 225 W. Compare the table of benchmark results to find out which graphic card is better.