Comparison of XFX Radeon RX Vega 64 Silver Fan video card vs GIGABYTE GeForce GTX 1080 D5X 8G video card by specifications and benchmarks. XFX Radeon RX Vega 64 Silver Fan runs at 1.247 GHz base clock speed and has 8 GB of HBM2 memory, while video card GIGABYTE GeForce GTX 1080 D5X 8G runs at 1.607 GHz base clock speed and has 8 GB of GDDR5X memory. The TDP of the first video card is 295 W, and the second is 180 W. Compare the table of benchmark results to find out which graphic card is better.