Comparison of ZOTAC GeForce GTX 1070 Founders Edition video card vs GALAX GeForce GTX 1080 Ti Founders Edition video card by specifications and benchmarks. ZOTAC GeForce GTX 1070 Founders Edition runs at 1.506 GHz base clock speed and has 8 GB of GDDR5 memory, while video card GALAX GeForce GTX 1080 Ti Founders Edition runs at 1.480 GHz base clock speed and has 11 GB of GDDR5X memory. The TDP of the first video card is 150 W, and the second is 250 W. Compare the table of benchmark results to find out which graphic card is better.