Comparison of GIGABYTE GeForce GTX 980 Ti Xtreme OC WaterForce video card vs ZOTAC GeForce GTX 1080 Ti Founders Edition 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 ZOTAC GeForce GTX 1080 Ti Founders Edition 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.