Comparison of GIGABYTE Radeon RX Vega 56 8G video card vs Gainward GeForce GTX 1070 Phoenix video card by specifications and benchmarks. GIGABYTE Radeon RX Vega 56 8G runs at 1.156 GHz base clock speed and has 8 GB of HBM2 memory, while video card Gainward GeForce GTX 1070 Phoenix 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.