Comparison of Sapphire NITRO+ RX 590 8G G5 video card vs PowerColor Red Dragon Radeon RX 590 8GB GDDR5 video card by specs and benchmarks. Sapphire NITRO+ RX 590 8G G5 runs at 1.469 GHz base clock speed and has 8 GB of GDDR5 memory, while video card PowerColor Red Dragon Radeon RX 590 8GB GDDR5 runs at 1.469 GHz 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.