Comparison of ZOTAC GeForce GTX 1070 AMP Extreme video card vs Gainward GeForce RTX 3080 Phantom GS video card by specifications and benchmarks. ZOTAC GeForce GTX 1070 AMP Extreme runs at 1.632 GHz+ 8 % base clock speed and has 8 GB of GDDR5 memory, while video card Gainward GeForce RTX 3080 Phantom GS runs at 1.440 GHz base clock speed and has 10 GB of GDDR6X memory. The TDP of the first video card is 250 W+ 67 %, and the second is 370 W+ 16 %. Compare the table of benchmark results to find out which graphic card is better.