No output from video card after playing 5-10 minutes

[KerbalSpaceJockey]

KSP works fine for 5-10 minutes, then the video card suddenly stops sending any output and my monitor displays "power save mode." Pressing Ctrl-Alt-Delete brings video back, and I can switch to Task Manager. When I switch back, KSP might be playable for a few more minutes but the video almost always goes out again. I've been playing KSP for a few years but this problem just started happening in February. I suspect it's a Windows or video driver bug because the same thing happens in my current install of 1.3.1 with recent mods removed and in a previous install of 1.3.0 which never had a problem. I can't find a specific activity that triggers the problem.

I'm running 64-bit KSP 1.3.1 on Windows 10 version 1709, with NVIDIA GeForce GTX 960 with driver 23.21.13.9101 (current last week). output_log.txt is at https://drive.google.com/open?id=1SH45_nbIchS84ZlicDeJkOJXLlwbF9gO

 

Thanks for any suggestions!

[KerbalSpaceJockey]

It looks like this was something physical, maybe the card overheating. I opened the case, dust-busted out the dust (there wasn't that much dust), and reseated the card and cable. It's all good now.