Comparison of ZOTAC GeForce GTX 1080 OEM video card vs ZOTAC GeForce GTX 1080 Ti AMP Edition video card by specifications and benchmarks. ZOTAC GeForce GTX 1080 OEM runs at 1.607 GHz base clock speed and has 8 GB of GDDR5X memory, while video card ZOTAC GeForce GTX 1080 Ti AMP Edition runs at 1.569 GHz+ 6 % base clock speed and has 11 GB of GDDR5X memory. The TDP of the first video card is 180 W, and the second is 270 W+ 8 %. Compare the table of benchmark results to find out which graphic card is better.