Comparison of ZOTAC GeForce GTX 1080 Ti AMP Extreme Core Edition video card vs ASUS Phoenix GeForce GTX 1660 TI OC video card by specifications and benchmarks. ZOTAC GeForce GTX 1080 Ti AMP Extreme Core Edition runs at 1.607 GHz+ 9 % base clock speed and has 11 GB of GDDR5X memory, while video card ASUS Phoenix GeForce GTX 1660 TI OC runs at 1.500 GHz base clock speed and has 6 GB of GDDR6 memory. The TDP of the first video card is 320 W+ 28 %, and the second is 120 W. Compare the table of benchmark results to find out which graphic card is better.