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what are these rubber holes on the back of the pc case? (lemmy.zip)

submitted 4 months ago* (last edited 4 months ago) by rolofox@lemmy.zip to c/asklemmy@lemmy.ml

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What are the rubber circles for on the back of my pc case? Should I just leave them like that if don't have a need for them? Or are they likely to let I'm dust into the motherboard?

Edit: thanks for all the replies, so just for water cooling I have no need for.

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[–] wheeldawg@sh.itjust.works 2 points 4 months ago

The rubber didn't agree well on my old case. I poked it a couple years ago trying to figure it what it might be and the little triangles has gotten stiff and snapped off on one side, so I stopped poking it.

I was today years old when I learned what they were for though. I knew it was some kind of tube or pipe or hose, but I've spent about 0.3 seconds actually thinking about it so I never figured it out.