Comparison of XFX Radeon RX 5700 XT Thicc III video card vs Sapphire NITRO+ RX 590 8G G5 video card by specs and benchmarks. XFX Radeon RX 5700 XT Thicc III runs at 1.670 GHz+ 4 % base clock speed and has 8 GB of GDDR6 memory, while video card Sapphire NITRO+ RX 590 8G G5 runs at 1.670 GHz+ 4 % 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.