Comparison of ASRock Phantom Gaming X Radeon RX Vega 56 video card vs GIGABYTE GeForce GTX 1080 Ti Gaming OC BLACK 11G video card by specifications and benchmarks. ASRock Phantom Gaming X Radeon RX Vega 56 runs at 1.156 GHz base clock speed and has 8 GB of HBM2 memory, while video card GIGABYTE GeForce GTX 1080 Ti Gaming OC BLACK 11G runs at 1.518 GHz+ 3 % base clock speed and has 11 GB of GDDR5X memory. The TDP of the first video card is 210 W, and the second is 280 W+ 12 %. Compare the table of benchmark results to find out which graphic card is better.