Comparison of GIGABYTE Radeon RX Vega 56 8G video card vs PowerColor Radeon RX Vega 64 Red Devil video card by specifications and benchmarks. GIGABYTE Radeon RX Vega 56 8G runs at 1.156 GHz base clock speed and has 8 GB of HBM2 memory, while video card PowerColor Radeon RX Vega 64 Red Devil runs at 1.417 GHz+ 14 % 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.