Comparison of GIGABYTE GeForce GTX 980 Ti Xtreme OC WaterForce video card vs Gainward GeForce GTX 1080 Ti Phoenix GS video card by specifications 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 Gainward GeForce GTX 1080 Ti Phoenix GS runs at 1.556 GHz+ 5 % base clock speed and has 11 GB of GDDR5X memory. The TDP of the first video card is 250 W, and the second is 250 W. Compare the table of benchmark results to find out which graphic card is better.