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