Some games push the GPU, some use the CPU. This will be a horse race with a photo finish.
You didn't tell which Core i5/7 either so if you picked a low i7 and a high i5 the 1070 Ti would win all tests.
I'm not going to answer since 1, it's a horse race, 2, the versions of the CPUs are left out and 3, no games listed.
Prime Pro i949
Intel Core I7
GeForce GTX 1060
Prime Pro i969
Intel Core I5
GeForce GTX 1070 Ti