Comparison of ASUS Dual Radeon RX 580 OC 4G video card vs Sapphire Nitro+ Radeon RX Vega 56 video card by specifications and benchmarks. ASUS Dual Radeon RX 580 OC 4G runs at 1.257 GHz base clock speed and has 4 GB of GDDR5 memory, while video card Sapphire Nitro+ Radeon RX Vega 56 runs at 1.266 GHz+ 10 % base clock speed and has 8 GB of HBM2 memory. The TDP of the first video card is 185 W, and the second is 325 W+ 55 %. Compare the table of benchmark results to find out which graphic card is better.