Comparison of MSI GeForce GTX 1060 GAMING X 3G video card vs MSI GeForce GTX 1660 GAMING 6G video card by specs and benchmarks. MSI GeForce GTX 1060 GAMING X 3G runs at 1.506 GHz base clock speed and has 3 GB of GDDR5 memory, while video card MSI GeForce GTX 1660 GAMING 6G runs at 1.506 GHz base clock speed and has 6 GB of GDDR5 memory. The weight is different, 1017 g vs 845 g. 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.