Comparison of Gainward GeForce RTX 2080 Phantom GS video card vs KFA2 GeForce RTX 3080 SG (1-Click OC) LHR 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 3080 SG (1-Click OC) LHR runs at 1.440 GHz base clock speed and has 10 GB of GDDR6X memory. The TDP of the first video card is 215 W, and the second is 320 W. Compare the table of benchmark results to find out which graphic card is better.