Terrible Game Artifacting

[Atmos]

Alrighty fellas. This is something that I honestly cannot diagnose.

 

starting, just this afternoon out of the blue about 1/2 of the games i play, coincidentally all of them using source engine 1, are artifacting like mad. Only about 8 hours ago all of these games worked flawlessly, and even now games using source engine 2 (dota 2 reborn beta), games using the ArmA Engine, and games using unreal and frostbite all work, but any source engine 1 game I've tried now starts artifacting on an absolutely insane level.

 

I've verified cache on all the games. I've uninstalled/reinstalled all the games, and I've restarted my computer several times over. I'm outta ideas, any one here know what might be causing it?

 

My gpu isn't overheating. my psu is functioning properly, my monitor is functioning properly, I'm fairly sure it's a software issue, I just can't diagnose it further than that.

[Atmos]

It appears to have resolved itself.

 

A couple of screenshots as well. 

 

 

It's also started artifacting in other games as well. I've a video of it, but I'm going to refrain from uploading it unless I absolutely must. It flashes between a maze of triangles, lines, and lights, and for only a frame or two, entirely grey screens.