Comparison of GIGABYTE GeForce GTX 960 WINDFORCE 2X OC 4GB Rev. 1 video card vs ZOTAC GAMING GeForce GTX 1660 6GB GDDR5 video card by specifications and benchmarks. GIGABYTE GeForce GTX 960 WINDFORCE 2X OC 4GB Rev. 1 runs at 1.216 GHz+ 8 % base clock speed and has 4 GB of GDDR5 memory, while video card ZOTAC GAMING GeForce GTX 1660 6GB GDDR5 runs at 1.530 GHz base clock speed and has 6 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.