Did GPU usage go up? Could be a case of giving the cpu more work to do brought frames down but the gpu may have been rendering more. Worth a check.
No it didn't, it still sat at 40% ish. 4.625Ghz is plenty to run a pair of Titans in any other game and keep them at 99% but not this Oxide demo. I am not fussed but does seem strange that only this one game does that.