Comparison of GIGABYTE Radeon RX Vega 64 Silver 8G video card vs XFX Radeon RX Vega 64 Black Fan video card by specs and benchmarks. GIGABYTE Radeon RX Vega 64 Silver 8G runs at 1.247 GHz base clock speed and has 8 GB of HBM2 memory, while video card XFX Radeon RX Vega 64 Black Fan runs at 1.247 GHz base clock speed and has 8 GB of HBM2 memory. The weight is different, -- vs --. The TDP of the first video card is 295 W, and the second is 295 W . Compare the benchmark results to find out which video card is better.