RAM Quantity and Usage in MSFS

I increased my RAM from 32 GB to 64 GB (3200 hz DDR G Skill Ripjaws) just for the hell of it, 4 months ago. I have I7-9700K, 2070 Super Mini, 1TB SSD. All settings on Ultra, LOD’s all the way up, and monitor 1920x1080. I was hoping to make better utilization of RAM, but most recent system update (5) uses only about 7-9 GB. FPS on complex cities varies about 45-65 (temporarily decreases when suddenly changing the view). I tried going back down on page-file size and even turning it off, with little difference, or any observable performance difference.

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