For ED Devs,
I provide a link to my last Blue Flag Track, a screenshot of afterburner's perf graphs and a screenshot of my settings. The framerate and GPU usage was erratic. I hope this helps in some way. Let me know if I can provide more data.
My system specs are: Windows 10, 32GB DDR4, i5-7600k@4.5GHz, GTX1070 8GB
Edit: Running with Oculus Rift CV1, PD=1.3
https://www.dropbox.com/sh/7v511puz3mfp9fo/AABc0rmH4HOGoIRCyYTBY7K0a?dl=0