Comparison of XFX Radeon RX Vega 64 Black Fan video card vs GIGABYTE GeForce GTX 1080 Ti Founders Edition 11G video card by specifications and benchmarks. XFX Radeon RX Vega 64 Black Fan runs at 1.247 GHz base clock speed and has 8 GB of HBM2 memory, while video card GIGABYTE GeForce GTX 1080 Ti Founders Edition 11G runs at 1.480 GHz base clock speed and has 11 GB of GDDR5X memory. The TDP of the first video card is 295 W, and the second is 280 W+ 12 %. Compare the table of benchmark results to find out which graphic card is better.