Beyond CSI - Hardware failed, noticing this on PCB boards...

[Zhariak]

Mods, please delete thread. Found info... Thnx

[UndrgroundRider]

This looks like it's solder flux residue. I've never seen it turn grey like that but the outline of the grey spots matches exactly where the solder flux residue would be. No way is there metal shavings in the air or anything like that. A much more likely culprit for the reaction is heat, especially consider it's a video card...

EDIT: Very interested to know what you found. Was it the flux?

[Zhariak]

Originally posted by UndrgroundRider
This looks like it's solder flux residue. I've never seen it turn grey like that but the outline of the grey spots matches exactly where the solder flux residue would be. No way is there metal shavings in the air or anything like that. A much more likely culprit for the reaction is heat, especially consider it's a video card...

EDIT: Very interested to know what you found. Was it the flux?

I still don't know if it's related, but found some images that are leading me to investigate creep corrosion (sulfur or something).

Took some extensive googling (literally time consuming and extensive), but I think that might be it.

It's just weird because there's no sulfur smell in the air. AFAIK the air is crystal clean with no contaminants, numerous filters, not even dust buildup (surprising with how dry the air is).