Comparison of ZOTAC GeForce GTX 1080 AMP Edition video card vs KFA2 GeForce GTX 1660 Super video card by specifications and benchmarks. ZOTAC GeForce GTX 1080 AMP Edition runs at 1.683 GHz+ 5 % base clock speed and has 8 GB of GDDR5X memory, while video card KFA2 GeForce GTX 1660 Super runs at 1.530 GHz base clock speed and has 6 GB of GDDR6 memory. The TDP of the first video card is 230 W+ 28 %, and the second is 125 W. Compare the table of benchmark results to find out which graphic card is better.