Comparison of Sapphire NITRO+ RX 590 8GB AMD 50 Gold Edition video card vs XFX Radeon RX 590 Fatboy Core Edition 8GB video card by specifications and benchmarks. Sapphire NITRO+ RX 590 8GB AMD 50 Gold Edition runs at 1.469 GHz base clock speed and has 8 GB of GDDR5 memory, while video card XFX Radeon RX 590 Fatboy Core Edition 8GB runs at 1.469 GHz base clock speed and has 8 GB of GDDR5 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.