Comparison of ZOTAC GeForce GTX 1080 IceStorm 2X video card vs MANLI GeForce GTX 1660 (M1431+N542) video card by specifications and benchmarks. ZOTAC GeForce GTX 1080 IceStorm 2X runs at 1.607 GHz base clock speed and has 8 GB of GDDR5X memory, while video card MANLI GeForce GTX 1660 (M1431+N542) runs at 1.530 GHz base clock speed and has 6 GB of GDDR5 memory. The TDP of the first video card is 230 W+ 28 %, and the second is 120 W. Compare the table of benchmark results to find out which graphic card is better.