As imtoooldforthis said maybe it's internet problem then? I had drops in FPS when I had poor connection.
What's your Objects LOD? Apparently higher is better, as one of comments under fps videos says:
One small note to the Object LOD: This setting can have a huge effect on approaching big airports. This setting basically does not change the number of the objects, but rather the distance, at which the LOD quality of the objects will change, meaning at which distance they appear and get more detailed.
The issue here is often NOT, that it has an impact on the render performance, but rather overloads your hardware I/O. If the setting is set too low, detailed objects will get loaded pretty late. When having for example a big airport with a lot of ground vehicles, small building, fences etc. this can have a very bad effect on your FPS on approach, not because your graphic card has not enough power to render them, but because a very high number of those objects are loaded simultaneously at a pretty crucial state of the flight. That's why many people, that get very good frames all around the whole flight, experience extreme frame losses on short final or on landing: their CPU can't handle the sheer amount of all the data, that needs be loaded in a very very short time. Once all is loaded, the FPS are fine again as the CPU is free for the "normal" calculations and the GPU is probably far from limiting anyway.
So this is setting should never be too low. It's not affecting calculation/render performance too much (of course it will at some point), but is does massively affect I/O performance, even with newer hardware. And if the CPU is busy loading all those small little details, it is basically clogged, so you see the big FPS loss, until everything is in place and the CPU has again time to send your calculations through. Therefore it is often better to have higher setting, that may lead to lower overall FPS, but won't kill your FPS during approach.
MSFS 2020 Graphics Settings.Today I walk you through my graphics settings for Microsoft Flight Simulator 2020 and how I achieve a stable frame rate while kee...
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