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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 [email protected] to c/[email protected]

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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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[–] [email protected] 3 points 4 months ago

Anything that doesn't have an external connector or some way to mount one. One example would be if you were using a USB Wi-Fi radio and wanted to connect it to the internal USB connectors but you'd need to pass the antenna to the outside of the case.