Comparison of ZOTAC GeForce GTX 1070 Ti OEM video card vs Colorful iGame GeForce GTX 1660 Ti Ultra 6G-V video card by specifications and benchmarks. ZOTAC GeForce GTX 1070 Ti OEM runs at 1.607 GHz base clock speed and has 8 GB of GDDR5 memory, while video card Colorful iGame GeForce GTX 1660 Ti Ultra 6G-V 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.