The game starts at +120 fps, but within 5 minutes of play it sinks to 29 fps, dipping sickeningly for no reason to under 10 fps so that I can't even input commands.
I have an i7-7700HQ, a GTX 1080, and 32 GB of RAM.
I recently moved the entire game to my SSD, nothing changed.
I downloaded the test profile as suggested in the FAQ.
I have tried every single performance tip on Reddit going back 3 years.
I have monitored my CPU and it never goes above 40% (on any core).
I have monitored the GPU and it never goes above 60%.
I recently completely reinstalled windows to rule out malware.
My graphics driver is up-to-date.
The only thing I haven't tried is rolling back to an older driver.
I have over 400 hours in the game without a problem like this!
Please help!