Comparison of GIGABYTE GeForce GTX 980 Ti Xtreme OC WaterForce video card vs EVGA GeForce GTX 1080 Ti K|NGP|N GAMING video card by specs and benchmarks. GIGABYTE GeForce GTX 980 Ti Xtreme OC WaterForce runs at 1.241 GHz+ 24 % base clock speed and has 6 GB of GDDR5 memory, while video card EVGA GeForce GTX 1080 Ti K|NGP|N GAMING runs at 1.241 GHz+ 24 % base clock speed and has 11 GB of GDDR5X 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.