OK, then you're in luck. I had a bunch of old 1U rack servers and even in the next room it was too annoying to run them (they had a bunch of 40mm fans which always ran at full speed, because in a server room, no one can hear you scream).
I don't run it anymore but my old server was a dual xeon (with two of those coolers crammed in) and I rarely heard a peep out of it.