Comparison of MANLI GeForce GTX 1080 Hydrosphere video card vs ZOTAC GAMING GeForce GTX 1660 Twin Fan video card by specifications and benchmarks. MANLI GeForce GTX 1080 Hydrosphere runs at 1.708 GHz+ 6 % base clock speed and has 8 GB of GDDR5X memory, while video card ZOTAC GAMING GeForce GTX 1660 Twin Fan 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.