Aero / General sim drops in fps randomly, not scenery?

This might be more of a general sim thing but its most noticeable on the aero in vr.  

For my tests i have the varjo aero set to 45 fps motion smoothing mode.  I simply do a short route from laguardia in the a320, then slew slightly toward central park.  At first i thought if i disabled certain scenery elements (and i have a lot, close to 1TB) that this drop i saw wouldnt occur.  Basically as nearing central park from say 3000 feet, the fps goes from a steady 45 to 30 or 22 even, then back up.  A few times after unselecting certain scenery i managed to have it not do the drop, so i thought i was narrowing in on a scenery related solution, but eventually i concluded its just how it is with the system.

Sometimes you can get to that point no drop, make a turn and another one occurs.  Yeah i chose the hardest hitting area, because i felt if i could get a solid 45 everywhere here it would be golden, if i could isolate the cause.

I've concluded its just the current state of the sim and even going from say my 12900k at 4.9 to the new 14900k (6400mhz ram) at 6ghz (7000mhz ram) probably wont help with these known dips (i was considering the swap).  I'm also on a gigabyte 4090 clock overclocked to plus 180 and memory plus 800 (which doesnt help much either).  I spent a half day trying various things, disabling chunks of scenery, thinking i made progress only to come back to the same issue

If anyones found the silver bullet to make these random dips go away i'd love to know more.  (i also set the cpu priority to high for the exe for msfs)

Edited October 10, 20232 yr by theskyisthelimit