Unusual graphical glitches, which persist even after several attempts to fix?

[Demiourgia]

So lately I've been experiencing a number of glitches that happen to me on pretty much every viewer, from the Second Life Viewer, to Firestorm, to Black Dragon.

These glitches vary.

1. Extra pixels around the edges of models.
2. Flashing body layers, either complete or partial. Oftentimes, the darkened, flashing part has individual pixels in it. (Warning: will start video download if your browser doesn't automatically play it)
3. Furniture with flashing layers, also with pixels, squares appearing inside it. 
4. Whatever this is (another video)
5. A single avatar's textures stretching out across my entire screen in completely random directions
6. THE FOG IS COMING. Seems to only happen when the viewer brings my system's memory usage to 100%.
7. Clothes stretching when zooming out.
8. Avatars appearing broken after slightly moving camera, with only few faces of their body showing.

So the tl;dr of all my attempted fixes boil down to:

- Replacing every part of my PC that isn't the PSU, CPU or motherboard
- Cleaning, reseating, checking connections, signs of damage to components, etc.
- Trying different versions of the drivers on both my old and my new GPU
- Reinstalling all viewers, clearing cache, saved data, etc.

- Resetting my BIOS
- TO DO: Probably fully reinstall Windows.

I'm not even sure what I could even try at this point. It only happens in SL; haven't had anything like this in the games I play.

Any ideas what might be causing it and what else I could try?

Edited February 25, 2023 by Demiourgia

[Lunas Heartsong]

On 3/14/2023 at 11:17 PM, Lindal Kidd said:

If you're using a completely different PC, and you said earlier that you'd replaced the internet modem, you've narrowed the problem to either the Linden Lab servers or your ISP.

Have you tried going to a friend's house or an internet cafe and logging in your account using a different ISP, as I suggested earlier?

i  would say it is linden lab servers, as they are  old the LL GRAPHICS aren't near as good and games

[Alwin Alcott]

4 hours ago, Lunas Heartsong said:

i  would say it is linden lab servers, as they are  old the LL GRAPHICS aren't near as good and games

LL doesn;t even HAVE servers, all what you see is in the cloud of Amazon.
 

Edited January 20 by Alwin Alcott