Comparison of PowerColor Radeon RX Vega 56 Red Devil video card vs Sapphire Radeon RX Vega 64 video card by specifications and benchmarks. PowerColor Radeon RX Vega 56 Red Devil runs at 1.308 GHz+ 13 % base clock speed and has 8 GB of HBM2 memory, while video card Sapphire 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.