Comparison of NVIDIA GeForce GTX 980 Ti video card vs EVGA GeForce GTX 1080 Ti GAMING video card by specifications and benchmarks. NVIDIA GeForce GTX 980 Ti runs at 1.002 GHz base clock speed and has 6 GB of GDDR5 memory, while video card EVGA GeForce GTX 1080 Ti GAMING runs at 1.480 GHz 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.