Comparison of Gainward GeForce RTX 2080 Phantom GS video card vs KFA2 GeForce RTX 2080 Ti EX 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 KFA2 GeForce RTX 2080 Ti EX runs at 1.350 GHz base clock speed and has 11 GB of GDDR6 memory. The TDP of the first video card is 215 W, and the second is 250 W. Compare the table of benchmark results to find out which graphic card is better.