Comparison of ZOTAC GeForce GTX 1070 Ti AMP Extreme video card vs ASUS Dual GeForce GTX 1660 TI OC video card by specifications and benchmarks. ZOTAC GeForce GTX 1070 Ti AMP Extreme runs at 1.607 GHz base clock speed and has 8 GB of GDDR5 memory, while video card ASUS Dual GeForce GTX 1660 TI OC 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.