Thanks for the info, I will definitely look into this further. So far using the built in FSX limiter had been slower in every case vs unlimited but I'm curious to run the tests with an external limiter.
I've always run with the built in limiter but was surprised recently when I started testing to see results opposite of what I expected. I've read about potential smoothness issues or stutters running unlimited but it either isn't happening for me or I can't perceive it. It will be interesting to see how this plays out.