Bizarre performance issues

[blorgon]

PC specs:

i7-8700 (non-K)

16 GB RAM

GTX 1070

Game installed on PCIe SSD

Set up:

Running KSP (1.4.3) 64-bit in borderless windowed mode.

Issues:

Firstly, I want to mention that setting KSP to high priority in the task manager actually bombs the performance (~80 fps drop when sitting on the launchpad). So that's... weird.

After returning KSP's priority back to normal, I've noticed some really bizarre behavior: if the game window is focused (i.e., I click anywhere on the screen in KSP) for a little while (less than a minute), performance will drop to around 15 fps. Once I click away to my second monitor on another application, or just win+D to the desktop, KSP goes back up to around 120 fps. If I click back to the game, performance immediately drops to around 80 fps, and then again, after a while drops all the way back down to 15 fps.

Nothing is spamming the console. The craft I'm flying is 84 parts.

Here's what the performance tab looks like when the game slows down:

 

Mods installed:

All of these mods are updated (or have forks) for 1.4.3.

Any ideas?

[Mark Kerbin]

Check your graphics card settings, maybe your drivers and see what else your computer is doing in the background. It’s possible you have something sucking up your gpu. Also don’t try to change the settings, as you found out.

Also MM is now on 3.0.7 but I doubt that matters. 

Best bet for performance issues is that DiRT, scatterer, and DOE don’t like each other or your pc. I mean mine is more of a potato than yours, but I don’t think my FPS is that bad. Try uninstalling(if you haven’t already) and check again.