Comparison of Sapphire Radeon RX Vega 56 video card vs GIGABYTE GeForce GTX 1070 WINDFORCE 3X 8G video card by specifications and benchmarks. Sapphire 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 1070 WINDFORCE 3X 8G runs at 1.506 GHz base clock speed and has 8 GB of GDDR5 memory. The TDP of the first video card is 210 W, and the second is 150 W. Compare the table of benchmark results to find out which graphic card is better.