First time writing here. This is the same issue as After playing a few hours, FPS drops from 40 to 5FPS - #34 by tjsasakifln except my setup is less than minimum requirements and the issue affects me after flying for only 5 minutes.
Sabertooth P67 (10 years old I know, LOL).
i7 2600K, 16 GB RAM.
GeForce GTX 960, 2 GB VRAM.
250 GB SSD
So I realize that this doesn’t meet minimum requirements but I feel I should write about it anyway.
I’ve disabled traffic and set general rendering to the lowest settings (600x400). I fly out of a small airport north of Toronto and travel to a small airport further north of Toronto (so no cityscapes).
So initially flying is fine, but after 5 minutes, it grinds to a halt (10fps in cockpit view flying cessna 152). If I change camera to external view, I get 70fps again. If I change camera to external view (just behind the tail) and disable HUD I get 10fps (so I can’t fly, in other words).
Monitoring my CPU/GPU, whenever I’m in cockpit view, and my framerate goes to 10fps, the GPU goes down almost to nothing. Whenever I change back to external view the GPU spikes again to 90%. So the bottleneck appears to be the CPU (it’s feeding the GPU in external view, but not in cockpit view).
So I was thinking, what’s the difference between the two external views I mentioned? I believe one is called drone camera view. That is the good one. If I try to move the yoke, I’m not sure if I have control of the plane in drone camera view?
Anyway, in developer mode, displaying fps, I see “Limited by MainThread”, and I see response time for MainThread to as much as 700ms (when framerate goes down to 10fps).
So I’m considering buying either a new PC (to play MSFS 2020) or maybe I should try MSFSX instead? I just think it’s weird that it runs fine for 5 min. before it significantly slows down.