UPDATED: Hello dear Fallout team, I noticed something quite singular and serious during the game. In the situation framed in the attached image (located exactly in the "Fens street sewer") I found that staring for about 3-4 minutes at that laser pistol pile will make my GPU temp increase like crazy in few minutes hitting unbelievably 90-98°celsius (first time in my life) resulting in the game starting to seriously stutter because of the GPU overheating and possibly breaking. From 60 fps to 30-40 in that critical moment.
My fan was locked at 50% so stupid! I did another stress test and now the GPU stays around 90° but still a strange temp level for that only effect, it increases so quickly in that particular scene still a bit unusual it really stresses the GPU with only that smoke effect. You can feel its pain. Could be also a driver problem.
I discovered this leaving accidentally my character in that position for about 4-5 minutes. Not sure if is the red laser smoke effect or the combination of it with other surfaces and effects, but something is very wrong and must be fixed and corrected soon there.
I hope you can take care of that soon
My GPU: Nvidia GTX 680 2048MB
System: Windows 10 x64
CPU: i5-3550
RAM: 8GB
Best Regards