Comparison of ASUS ROG Strix GeForce GTX 1080 Ti video card vs Gainward GeForce GTX 1660 Pegasus video card by specifications and benchmarks. ASUS ROG Strix GeForce GTX 1080 Ti runs at 1.493 GHz+ 1 % base clock speed and has 11 GB of GDDR5X memory, while video card Gainward GeForce GTX 1660 Pegasus 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.