what are these rubber holes on the back of the pc case?

TheSlyFox@lemmy.zip to Asklemmy@lemmy.ml – 196 points –

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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anyone know the name of this case? asking for a friend

I know the Corsair 800D used to have these. This looks different, but might be in the same line.