Comparison of ZOTAC GeForce GTX 1080 AMP Edition video card vs Gainward GeForce GTX 1080 Ti Phoenix video card by specifications and benchmarks. ZOTAC GeForce GTX 1080 AMP Edition runs at 1.683 GHz+ 5 % base clock speed and has 8 GB of GDDR5X memory, while video card Gainward GeForce GTX 1080 Ti Phoenix runs at 1.480 GHz base clock speed and has 11 GB of GDDR5X memory. The TDP of the first video card is 230 W+ 28 %, and the second is 250 W. Compare the table of benchmark results to find out which graphic card is better.