Comparison of ZOTAC GAMING GeForce GTX 1660 Twin Fan video card vs KFA2 GeForce RTX 3080 Ti HOF video card by specifications and benchmarks. ZOTAC GAMING GeForce GTX 1660 Twin Fan runs at 1.530 GHz base clock speed and has 6 GB of GDDR5 memory, while video card KFA2 GeForce RTX 3080 Ti HOF runs at 1.365 GHz base clock speed and has 12 GB of GDDR6X memory. The TDP of the first video card is 120 W, and the second is 350 W. Compare the table of benchmark results to find out which graphic card is better.