Comparison of PowerColor Red Devil Radeon RX 590 8GB GDDR5 video card vs XFX Radeon RX 5700 XT Thicc III video card by specifications and benchmarks. PowerColor Red Devil Radeon RX 590 8GB GDDR5 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 1.670 GHz+ 4 % base clock speed and has 8 GB of GDDR6 memory. The TDP of the first video card is 225 W, and the second is 225 W. Compare the table of benchmark results to find out which graphic card is better.