Comparison of Gainward GeForce GTX 1080 Ti Phoenix GS video card vs GALAX GeForce GTX 980 Ti OC Black Edition video card by specifications and benchmarks. Gainward GeForce GTX 1080 Ti Phoenix GS runs at 1.556 GHz+ 5 % base clock speed and has 11 GB of GDDR5X memory, while video card GALAX GeForce GTX 980 Ti OC Black Edition runs at 1.025 GHz+ 2 % base clock speed and has 6 GB of GDDR5 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.