Comparison of GIGABYTE GeForce GTX 1660 D5 6G video card vs MSI GeForce RTX 3090 AERO 24G video card by specifications and benchmarks. GIGABYTE GeForce GTX 1660 D5 6G runs at 1.530 GHz base clock speed and has 6 GB of GDDR5 memory, while video card MSI GeForce RTX 3090 AERO 24G runs at 1.395 GHz base clock speed and has 24 GB of GDDR6X memory. The TDP of the first video card is 120 W, and the second is 350 W. Compare the table of benchmark results to find out which graphic card is better.