Comparison of XFX Radeon RX 5700 XT Double Dissipation video card vs XFX Radeon RX 590 Fatboy Core Edition 8GB video card by specs and benchmarks. XFX Radeon RX 5700 XT Double Dissipation runs at 1.605 GHz base clock speed and has 8 GB of GDDR6 memory, while video card XFX Radeon RX 590 Fatboy Core Edition 8GB runs at 1.605 GHz base clock speed and has 8 GB of GDDR5 memory. The weight is different, -- vs --. The TDP of the first video card is 225 W, and the second is 225 W . Compare the benchmark results to find out which video card is better.