Comparison of EVGA GeForce GTX 1080 Ti SC Hydro Copper GAMING video card vs EVGA GeForce GTX 1660 XC ULTRA GAMING video card by specifications and benchmarks. EVGA GeForce GTX 1080 Ti SC Hydro Copper GAMING runs at 1.556 GHz+ 5 % base clock speed and has 11 GB of GDDR5X memory, while video card EVGA GeForce GTX 1660 XC ULTRA GAMING runs at 1.530 GHz base clock speed and has 6 GB of GDDR5 memory. The TDP of the first video card is 250 W, and the second is 120 W. Compare the table of benchmark results to find out which graphic card is better.