Comparison of XFX Radeon RX Vega 56 video card vs GIGABYTE GeForce GTX 1080 Xtreme Gaming 8G video card by specifications and benchmarks. XFX 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 Xtreme Gaming 8G runs at 1.759 GHz+ 9 % base clock speed and has 8 GB of GDDR5X memory. The TDP of the first video card is 210 W, and the second is 180 W. Compare the table of benchmark results to find out which graphic card is better.