Comparison of ZOTAC GeForce GTX 1070 Twin Fan video card vs Gainward GeForce RTX 2080 SUPER Phoenix video card by specifications and benchmarks. ZOTAC GeForce GTX 1070 Twin Fan runs at 1.506 GHz base clock speed and has 8 GB of GDDR5 memory, while video card Gainward GeForce RTX 2080 SUPER Phoenix runs at 1.650 GHz base clock speed and has 8 GB of GDDR6 memory. The TDP of the first video card is 220 W+ 47 %, and the second is 250 W. Compare the table of benchmark results to find out which graphic card is better.