Comparison of Gainward GeForce GTX 1080 Phoenix video card vs ZOTAC GeForce GTX 1080 Ti AMP Extreme video card by specifications and benchmarks. Gainward GeForce GTX 1080 Phoenix runs at 1.607 GHz base clock speed and has 8 GB of GDDR5X memory, while video card ZOTAC GeForce GTX 1080 Ti AMP Extreme runs at 1.645 GHz+ 11 % base clock speed and has 11 GB of GDDR5X memory. The TDP of the first video card is 180 W, and the second is 320 W+ 28 %. Compare the table of benchmark results to find out which graphic card is better.