Severe FPS/UPS drops, and a cresh [0.17.52]

[modrusis]

Problem:
I have had Factorio for quite some time now and have been running on the same machine since day 1. I upgraded to the new version and then didn't play for a while. When I loaded up the game and continued my save file I experienced massive slow down. I have never had any issue with speeds as I have a pretty good pc. I have over 90 hours on this one map alone. After a few minutes of attempting to run around the game crashed. It said something about not being able to write to a file. Sorry but I was switching windows to check task manager to see if a background update was sucking up my CPU. I have since played again, have not been able to reproduce the crash, but am still suffering major FPS/UPS drops. I have seen the UPS be at 60 and the FPS drop to below 30 (picture 2, Picture 3 is about 1 second later), and then they will both drop to 30's or lower (picture 4). I have noticed when trains come by the lag spikes happen more frequently. I have started a new map and just running around in the starting area my FPS/UPS is going up and down the same way... I have never had to post before so I hope I have gotten everything you need.. Please help.

System:
Windows 7
56 GB Ram
Intel Core i7-5930K CPU @3.50GHz
nVidia GTX 1080 FTW2 8GB GDDR5X

[modrusis]

Oh, and no mods installed.

[Rseding91]

Try turning off vsync.

[modrusis]

I followed your instructions and it stayed at 60/60. I then turned vsync back on and it it working the same 60/60 as normal. Any ideas why that glitched?

[posila]

No idea. I suspect some problem with GPU's power states. After transition to DirectX 11, and optimizing rendering, high-end GPUs on some PCs seem to insinst on running in very low power mode and not being able to render the game in 60 FPS. We have not been able to reproduce this though.

Do you use any gaming overlays besides Steam one?

[modrusis]

Well for gaming I have Uplay, origin, battle.net, and of course discord. I have EVGA Pricision X (this program has caused issues with other games).

[modrusis]

If this happens again is there anything I can do while the issue is going on that will help you guys?

[posila]

Thanks for the offer. Unfortunatelly, at the moment I can think of anything that would be reasonably simple to capture and that could somewhat shed a light on what is going on. If I think of something, I'll reach out to you, thank you.