Massive fps drop w/ vorpX

[rhino23]

OK, framerate question… (running on i5-6600 @ 3.5, a GTX 1070, 16GB RAM and Windows 10).

FPS outside of vorpX (monitor @ 1080p):
rfactor 1 – high 500s-low 1000s during gameplay depending on track
rfactor 2 – high 200s

FPS when running vorpX (Rift CV1 @ 1280×1440):
rfactor 1 – 22.5
rfactor 2 – 90 with some fiddling of the quality settings

Is it normal to take such a massive hit?
And what could be causing rfactor 1 to not surpass 22.5fps while running vorpX? I’ve lowered all the quality settings to the lowest and nothing seems to make a difference.

[TheIronWolf]

Check Ansynchronous/fluid settings in vorpX, see what you get by flipping.
Note, rF1 (and gtr2) sometimes starts up very slowly, low framerate, I’ve found no workaround other than start it multiple times.

Can you share how did you achieve 90fps in rF2? What are your settings?

[Author]

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