Comparison of MSI GeForce GTX 1660 GAMING X 6G video card vs GIGABYTE GeForce GTX 1660 D5 6G video card by specifications and benchmarks. MSI GeForce GTX 1660 GAMING X 6G runs at 1.530 GHz base clock speed and has 6 GB of GDDR5 memory, while video card GIGABYTE GeForce GTX 1660 D5 6G 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.