Comparison of KFA2 GeForce GTX 1080 Ti video card vs MSI GeForce GTX 1660 VENTUS XS 6G video card by specifications and benchmarks. KFA2 GeForce GTX 1080 Ti runs at 1.480 GHz base clock speed and has 11 GB of GDDR5X memory, while video card MSI GeForce GTX 1660 VENTUS XS 6G 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.