Comparison of GIGABYTE Radeon RX 590 Gaming 8G video card vs XFX Radeon RX Vega 64 Silver Fan video card by specifications and benchmarks. GIGABYTE Radeon RX 590 Gaming 8G runs at 1.469 GHz base clock speed and has 8 GB of GDDR5 memory, while video card XFX Radeon RX Vega 64 Silver Fan runs at 1.247 GHz base clock speed and has 8 GB of HBM2 memory. The TDP of the first video card is 225 W, and the second is 295 W. Compare the table of benchmark results to find out which graphic card is better.