I haven't heard anything out of my dp 1.8
Well, if I listen real close, I think I can hear a very slight whine noise. It is so slight, it isn't that noticable.
It's not like the windows machine that I built.
I wasn't sure how many fans to put in it, so I put one in every available fan position, for a total of 3 90cm and 1 120cm. It sounds like a vacuum cleaner when I have it on.