The game had already seriously slowed down by turn 275 (10~20 fps) (auto-save 278.ctr) but once I reach turn 276 (auto-save 279.ctr) the framerate goes down to 1 and stays there.
According to MSI Afterburner, nothing on the computer is used to 100% and the GPU even occasionally drops down to 0%.
I reached turn 282 like that and the issue didn't resolve itself. Reloading, changing graphics settings down to "fastest", forcing Vulkan in the launch options, having Steam verify the game's file didn't change anything.
OS is Win 7 64 bits, GPU is EVGA GeForce GTX 1660 Super SC Ultra, CPU is AMD Ryzen 5 3600 and I have 16GB of RAM, so well above the recommended specs.
edit: a friend playing these saves also gets terrible performance. When I played his which was at turn 272 (I kept going on it until 280), my framerate was at its cap and stable.
I am having a similar issue at my late game. A sudden and massive fps drop around the middle of the contemporary era. It does not correct itself after reloading or changing the settings to the minimum.
SanevKhan
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