Comparison of Gainward GeForce GTX 1080 Phoenix GS video card vs EVGA GeForce GTX 1660 Ti SC ULTRA BLACK GAMING video card by specifications and benchmarks. Gainward GeForce GTX 1080 Phoenix GS runs at 1.708 GHz+ 6 % base clock speed and has 8 GB of GDDR5X memory, while video card EVGA GeForce GTX 1660 Ti SC ULTRA BLACK 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.