Comparison of INNO3D GeForce GTX 1080 Ti Twin X2 video card vs KFA2 GeForce GTX 1660 Prodigy video card by specifications and benchmarks. INNO3D GeForce GTX 1080 Ti Twin X2 runs at 1.480 GHz base clock speed and has 11 GB of GDDR5X memory, while video card KFA2 GeForce GTX 1660 Prodigy runs at 1.530 GHz base clock speed and has 6 GB of GDDR5 memory. The TDP of the first video card is 250 W, and the second is 120 W. Compare the table of benchmark results to find out which graphic card is better.