Comparison of GIGABYTE GeForce GTX 1660 D5 6G video card vs Gainward GeForce RTX 2080 SUPER Phoenix 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 Gainward GeForce RTX 2080 SUPER Phoenix runs at 1.650 GHz base clock speed and has 8 GB of GDDR6 memory. The TDP of the first video card is 120 W, and the second is 250 W. Compare the table of benchmark results to find out which graphic card is better.