Comparison of PowerColor Radeon RX Vega 56 video card vs ZOTAC Gaming GeForce RTX 3070 Twin Edge OC LHR video card by specifications and benchmarks. PowerColor Radeon RX Vega 56 runs at 1.156 GHz base clock speed and has 8 GB of HBM2 memory, while video card ZOTAC Gaming GeForce RTX 3070 Twin Edge OC LHR runs at 1.500 GHz base clock speed and has 8 GB of GDDR6 memory. The TDP of the first video card is 210 W, and the second is 220 W. Compare the table of benchmark results to find out which graphic card is better.