Comparison of GIGABYTE GeForce GTX 1660 TI OC 6G video card vs GALAX GeForce RTX 2080 Ti video card by specifications and benchmarks. GIGABYTE GeForce GTX 1660 TI OC 6G runs at 1.500 GHz base clock speed and has 6 GB of GDDR6 memory, while video card GALAX GeForce RTX 2080 Ti runs at 1.350 GHz base clock speed and has 11 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.