Comparison of Sapphire Pulse Radeon RX 590 8G G5 video card vs Sapphire Pulse Radeon RX Vega 56 video card by specifications and benchmarks. Sapphire Pulse Radeon RX 590 8G G5 runs at 1.469 GHz base clock speed and has 8 GB of GDDR5 memory, while video card Sapphire Pulse Radeon RX Vega 56 runs at 1.208 GHz+ 4 % base clock speed and has 8 GB of HBM2 memory. The TDP of the first video card is 225 W, and the second is 280 W+ 33 %. Compare the table of benchmark results to find out which graphic card is better.