Comparison of ZOTAC GeForce GTX 960 Reference video card vs GIGABYTE GeForce GTX 1660 TI OC 6G video card by specs and benchmarks. ZOTAC GeForce GTX 960 Reference runs at 1.127 GHz base clock speed and has 2 GB of GDDR5 memory, while video card GIGABYTE GeForce GTX 1660 TI OC 6G runs at 1.127 GHz base clock speed and has 6 GB of GDDR6 memory. The weight is different, -- vs --. The TDP of the first video card is 120 W, and the second is 120 W . Compare the benchmark results to find out which video card is better.