I run a Dell PowerEdge r710 server out of my house and I'm moving in with roommates in a couple weeks. Unfortunately I don't think they'll appreciate the ~70dBA it generates and I'm looking for ways to make it quieter.
I looked into replacing the fans with something less noisy, but unfortunately none of the quieter options move nearly enough air. The best one I found has been the Thermaltake DuraMax 6 AF0057 60mm Case Cooler, but at less than half the CFM (30.3 vs 67.85 on the stock Delta PFC0612DE-F00 fans) it doesn't seem powerful enough.
I've also thought about putting Acoustic Foam Panels around the server to quiet it down, but acoustic panels also have the downside of acting like insulation, so heat could turn into an issue.