Comparison of ZOTAC GAMING GeForce GTX 1660 6GB GDDR5 video card vs KFA2 GeForce GTX 960 Reference Design OC video card by specifications and benchmarks. ZOTAC GAMING GeForce GTX 1660 6GB GDDR5 runs at 1.530 GHz base clock speed and has 6 GB of GDDR5 memory, while video card KFA2 GeForce GTX 960 Reference Design OC runs at 1.152 GHz+ 2 % base clock speed and has 4 GB of GDDR5 memory. The TDP of the first video card is 120 W, and the second is 120 W. Compare the table of benchmark results to find out which graphic card is better.