Comparison of EVGA GeForce GTX 1080 SC2 GAMING video card vs EVGA GeForce GTX 1660 Ti XC ULTRA GAMING video card by specifications and benchmarks. EVGA GeForce GTX 1080 SC2 GAMING runs at 1.708 GHz+ 6 % base clock speed and has 8 GB of GDDR5X memory, while video card EVGA GeForce GTX 1660 Ti XC ULTRA GAMING runs at 1.500 GHz base clock speed and has 6 GB of GDDR6 memory. The TDP of the first video card is 180 W, and the second is 120 W. Compare the table of benchmark results to find out which graphic card is better.