15 hours ago, Funky D said:

Although you may have narrowed down the main MSFS issue, I would still run UserBenchmark again and during the disk benchmark, pull up the task manager. The processes tab should have a disk column; I would check if there are any processes other than the UserBenchmark program using the disk, because something seems to be holding back your SSDs.

Will check this right away 🙂

Ran the task manager whilst running UserBenchmark again, and only program using any real amount was the UserBenchmark program itself.