Comparison of Colorful iGame GeForce GTX 1070 SI-8G-V video card vs Gainward GeForce GTX 1660 TI Pegasus video card by specifications and benchmarks. Colorful iGame GeForce GTX 1070 SI-8G-V runs at 1.506 GHz base clock speed and has 8 GB of GDDR5 memory, while video card Gainward GeForce GTX 1660 TI Pegasus 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.