Comparison of ASRock AMD Phantom Gaming U Radeon RX 590 8G OC video card vs XFX Radeon RX 5700 XT Thicc III video card by specs and benchmarks. ASRock AMD Phantom Gaming U Radeon RX 590 8G OC runs at 1.469 GHz base clock speed and has 8 GB of GDDR5 memory, while video card XFX Radeon RX 5700 XT Thicc III runs at 1.469 GHz base clock speed and has 8 GB of GDDR6 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.