Comparison of XFX Radeon RX Vega 56 video card vs ZOTAC GeForce GTX 1070 AMP Extreme video card by specs 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 ZOTAC GeForce GTX 1070 AMP Extreme runs at 1.632 GHz+ 8 % base clock speed and has 8 GB of GDDR5 memory. The weight is different, 1090 g vs --. The TDP of the first video card is 210 W, and the second is 250 W+ 67 % . Compare the benchmark results to find out which video card is better.