Comparison of Gainward GeForce GTX 1070 Founders Edition video card vs Gainward GeForce GTX 1660 TI Pegasus OC video card by specifications and benchmarks. Gainward GeForce GTX 1070 Founders Edition runs at 1.506 GHz base clock speed and has 8 GB of GDDR5 memory, while video card Gainward GeForce GTX 1660 TI Pegasus OC runs at 1.500 GHz base clock speed and has 6 GB of GDDR6 memory. The TDP of the first video card is 150 W, and the second is 120 W. Compare the table of benchmark results to find out which graphic card is better.