Comparison of ZOTAC GeForce GTX 1070 OEM V2 video card vs Gainward GeForce RTX 3080 12GB Phantom video card by specifications and benchmarks. ZOTAC GeForce GTX 1070 OEM V2 runs at 1.506 GHz base clock speed and has 8 GB of GDDR5 memory, while video card Gainward GeForce RTX 3080 12GB Phantom runs at 1.260 GHz base clock speed and has 12 GB of GDDR6X memory. The TDP of the first video card is 150 W, and the second is 350 W. Compare the table of benchmark results to find out which graphic card is better.