Comparison of Gainward GeForce RTX 2070 Phantom GS video card vs ZOTAC GAMING GeForce RTX 2080 AMP video card by specifications and benchmarks. Gainward GeForce RTX 2070 Phantom GS runs at 1.410 GHz base clock speed and has 8 GB of GDDR6 memory, while video card ZOTAC GAMING GeForce RTX 2080 AMP runs at 1.515 GHz base clock speed and has 8 GB of GDDR6 memory. The TDP of the first video card is 185 W+ 6 %, and the second is 225 W+ 5 %. Compare the table of benchmark results to find out which graphic card is better.