Comparison of GIGABYTE GeForce GTX 1080 Xtreme Gaming WATERFORCE WB 8G video card vs EVGA GeForce GTX 1660 BLACK GAMING video card by specifications and benchmarks. GIGABYTE GeForce GTX 1080 Xtreme Gaming WATERFORCE WB 8G runs at 1.759 GHz+ 9 % base clock speed and has 8 GB of GDDR5X memory, while video card EVGA GeForce GTX 1660 BLACK GAMING runs at 1.530 GHz base clock speed and has 6 GB of GDDR5 memory. The TDP of the first video card is 180 W, and the second is 120 W. Compare the table of benchmark results to find out which graphic card is better.