Comparison of GALAX GeForce GTX 1080 EX OC video card vs KFA2 GeForce GTX 1660 Mini (1-Click OC) video card by specifications and benchmarks. GALAX GeForce GTX 1080 EX OC runs at 1.657 GHz+ 3 % base clock speed and has 8 GB of GDDR5X memory, while video card KFA2 GeForce GTX 1660 Mini (1-Click OC) runs at 1.530 GHz base clock speed and has 6 GB of GDDR5 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.