Comparison of Gainward GeForce RTX 2070 Phantom GS video card vs KFA2 GeForce RTX 3090 HOF 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 KFA2 GeForce RTX 3090 HOF runs at 1.395 GHz base clock speed and has 24 GB of GDDR6X memory. The TDP of the first video card is 185 W+ 6 %, and the second is 420 W+ 20 %. Compare the table of benchmark results to find out which graphic card is better.