![](/static/253f0d9b/assets/icons/icon-96x96.png)
![](https://lemmy.ml/pictrs/image/d3d059e3-fa3d-45af-ac93-ac894beba378.png)
There were some old PCI cards that were very badly designed, and they required things plugged into them from inside the case, or they needed to plug into things on the motherboard. I had card that controlled Cold cathode tube lighting that could also connect to audio to sync to the music that worked that way
But, the actual answer is that the grommets are for old-school water-cooling.
It doesn’t have to be!
“?” in a URL often means “Delete from the ‘?’ until the end to avoid garbage”
Lemmy.ca defaults to: https://lemmy.ca/pictrs/image/d751342c-5d83-4a5e-9b6b-9817e03db780.jpeg
But if you’re on .world, you can do a little snip and things still work:
https://lemmy.world/pictrs/image/5441af5c-19cd-4ffb-aad8-94da9ea361a9.jpeg