If your fan noises 😉 are really loud you should install a wall made of acoustic drywall in front of that shared wall and fill the gap with acoustic foam. Acoustic foam alone won’t help with loud noise. Since that mostly reduces the reflection of sound. Sound can still pass trough the foam and then trough the wall.
The acoustic dry wall is a good shout, but I don't think my boyfriend would take too kindly to me shrinking our room and the shared wall has closets for both bedrooms. I'm hoping those closets will do something to help, and the foam wall paneling is a good shout, but I'm trying to think of ways to do it in a way that'll please his aesthetic desires. He doesn't want it to look like a "streamer's bedroom". I joke with him and say change one letter and it's more accurate, so maybe he'll considered some colored ones mounted at angles to create a more visually appealing surface. That, or try to mount a rug on the wall 😅
Jesus! What are you running that makes that much noise? I have two HP DL360p gen8's (older 1u units with LOUD fans when they get going) and a custom built gaming server in a rack at the end of my bed. Together they're sometimes a bit annoyingly loud when they're hard at work, but with the door closed you can barely hear them. I can't imagine a single server so loud that neighbors could hear it from a basement. You got a supercomputer in there or something?
If my dream of living out in the woods ever comes true, I'll legit do this. Until then, I figure I wouldn't last a week being so close to a major city so it's a moot point.
older 1u units with LOUD fans when they get going)
1U servers tend to have loud fans regardless of age. Small fans that spin very quickly (to get decent airflow) will do that. They're also designed for use in data centers where noise is less of a concern.
Sometimes you can replace server fans with Noctua fans, but the small Noctua fans generally have less airflow than the stock ones (usually made by Delta) so you'd have to check they'd be sufficient for your use case.