Comparison of ZOTAC GeForce GTX 1080 Ti AMP Edition video card vs PNY GeForce GTX 1660 TI XLR8 Gaming OC Dual Fan video card by specifications and benchmarks. ZOTAC GeForce GTX 1080 Ti AMP Edition runs at 1.569 GHz+ 6 % base clock speed and has 11 GB of GDDR5X memory, while video card PNY GeForce GTX 1660 TI XLR8 Gaming OC Dual Fan runs at 1.500 GHz base clock speed and has 6 GB of GDDR6 memory. The TDP of the first video card is 270 W+ 8 %, and the second is 120 W. Compare the table of benchmark results to find out which graphic card is better.