Comparison of Gainward GeForce GTX 1660 TI Pegasus video card vs ASUS Dual GeForce RTX 2080 Ti Advanced video card by specifications and benchmarks. Gainward GeForce GTX 1660 TI Pegasus runs at 1.500 GHz base clock speed and has 6 GB of GDDR6 memory, while video card ASUS Dual GeForce RTX 2080 Ti Advanced runs at 1.350 GHz base clock speed and has 11 GB of GDDR6 memory. The TDP of the first video card is 120 W, and the second is 250 W. Compare the table of benchmark results to find out which graphic card is better.