Comparison of Gainward GeForce RTX 2080 Phantom GS video card vs ZOTAC Gaming GeForce RTX 3070 AMP Holo video card by specifications and benchmarks. Gainward GeForce RTX 2080 Phantom GS runs at 1.515 GHz base clock speed and has 8 GB of GDDR6 memory, while video card ZOTAC Gaming GeForce RTX 3070 AMP Holo runs at 1.500 GHz base clock speed and has 8 GB of GDDR6 memory. The TDP of the first video card is 215 W, and the second is 240 W+ 9 %. Compare the table of benchmark results to find out which graphic card is better.