Where is the bottleneck?

None of my cores are maxed, nor my GPU. This seems like a lot of performance on the table, is there anyway to utilize any of it? I tried changing the 96 high LODs to 256 extreme LODs, but that just dropped the shader performance by another 20fps. Still nothing is visibly maxed or limited either.

Solution:

Ah i just found the solution. setting the CPU render ahead limit from 0 to 1 puts GPU at 99%

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