Comparison of ZOTAC GeForce GTX 960 4GB video card vs Colorful GeForce GTX 1660 NB 6G-V video card by specifications and benchmarks. ZOTAC GeForce GTX 960 4GB runs at 1.177 GHz+ 4 % base clock speed and has 4 GB of GDDR5 memory, while video card Colorful GeForce GTX 1660 NB 6G-V 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.