Poor Performance with eGPU and evga 1080ti SC and Blade15.

I have a Razerblade 15 advanced model with a Mantiz Venus eGPU equiped with an evga 1080ti SC2 System: 6 core procc 8750h 16gb ram 512gb SSD Samsung Evo 970 1070-Max-Q Internal Dedicated Card eGPU Mantiz Venus GPU - Evga 1080ti SC2 I have been getting worse benchmarks when using the 1080ti in egpu with TB3 than a 1070 max q internal. I was hoping to at least get a little bump in performance. I have uninstalled and reinstalled drivers numerous times, including using ddu. I have tried disabling the 1070, and internal gpu's through device manager with no help. I have tested both internal/external monitors and I get the same results. The 1080ti is performing about 50% of what the 1070-max-q is. Any ideas? I know TB3 has a bottleneck, but is it really that bad?