Low voltage GPU decoupling capacitor longevity
If one of the bulk capacitors was missing it will increase the ripple current the other capacitors are seeing.
This increase might exceed the rated value, which puts it into the realm of undefined behavior (sudden unexpected things might happen).
But increase of ripple current always leads to increased self heating which decreases the expected life of the capacitor.
So I'd replace them all while you are at it - just to be on the safe side (you can't fix the graphics processor if that dies next time).

This document from Nippon Chemicon shows a nice overview of possible failure modes with causes in aluminium electrolytic capacitors:

So the main fault mode is the one I described before, but there is a dotted line which indicates that it might be possible for excessive ripple current to lead to a short circuit condition, which would probably end quite bad for the card.

And the datasheet of the replacement part has this note in it: