Comparison of GIGABYTE GeForce GTX 1080 Ti Gaming OC 11G video card vs Gainward GeForce GTX 1660 Ghost OC video card by specifications and benchmarks. GIGABYTE GeForce GTX 1080 Ti Gaming OC 11G runs at 1.518 GHz+ 3 % base clock speed and has 11 GB of GDDR5X memory, while video card Gainward GeForce GTX 1660 Ghost OC runs at 1.530 GHz base clock speed and has 6 GB of GDDR5 memory. The TDP of the first video card is 280 W+ 12 %, and the second is 120 W. Compare the table of benchmark results to find out which graphic card is better.