Comparison of Sapphire Radeon RX Vega 56 video card vs ASUS Radeon RX Vega 64 video card by specifications and benchmarks. Sapphire Radeon RX Vega 56 runs at 1.156 GHz base clock speed and has 8 GB of HBM2 memory, while video card ASUS Radeon RX Vega 64 runs at 1.247 GHz base clock speed and has 8 GB of HBM2 memory. The TDP of the first video card is 210 W, and the second is 295 W. Compare the table of benchmark results to find out which graphic card is better.