Comparison of ZOTAC GeForce GTX 960 Single Fan 4GB video card vs Gainward GeForce GTX 1660 Ghost OC video card by specifications and benchmarks. ZOTAC GeForce GTX 960 Single Fan 4GB runs at 1.140 GHz+ 1 % base clock speed and has 4 GB of GDDR5 memory, while video card Gainward GeForce GTX 1660 Ghost OC 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.