Comparison of Colorful GeForce GTX 1060 SI-6G-V video card vs Gainward GeForce GTX 1660 Ghost video card by specs and benchmarks. Colorful GeForce GTX 1060 SI-6G-V runs at 1.506 GHz base clock speed and has 6 GB of GDDR5 memory, while video card Gainward GeForce GTX 1660 Ghost runs at 1.506 GHz base clock speed and has 6 GB of GDDR5 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.