Comparison of Gainward GeForce GTX 1660 Ghost OC video card vs Colorful GeForce RTX 2060 SI 6G-V video card by specifications and benchmarks. Gainward GeForce GTX 1660 Ghost OC runs at 1.530 GHz base clock speed and has 6 GB of GDDR5 memory, while video card Colorful GeForce RTX 2060 SI 6G-V runs at 1.365 GHz base clock speed and has 6 GB of GDDR6 memory. The TDP of the first video card is 120 W, and the second is 160 W. Compare the table of benchmark results to find out which graphic card is better.