Comparison of Gainward GeForce GTX 1080 Ti GS video card vs KFA2 GeForce GTX 980 Ti HOF Watercooled video card by specs and benchmarks. Gainward GeForce GTX 1080 Ti GS runs at 1.506 GHz+ 2 % base clock speed and has 11 GB of GDDR5X memory, while video card KFA2 GeForce GTX 980 Ti HOF Watercooled runs at 1.506 GHz+ 2 % base clock speed and has 6 GB of GDDR5 memory. The weight is different, -- vs --. The TDP of the first video card is 250 W, and the second is 250 W . Compare the benchmark results to find out which video card is better.