Art, I just got my backplane powered up with one of these and it's REALLY loud. About as loud as a blender or maybe a vacuum cleaner. Is that normal? If so are there any quieter alternatives? Thanks.
This one makes a very small amount of noise. But nothing as loud as you say.
I also have this one:
http://www.amazon.com/gp/product/B003ZTEAKY/ref=oh_details_o02_s00_i00?ie=UTF8&psc=1It is essentially the same rating, also for the Proliant DL-380, also rated for 1000w, but I found it to be much quieter, so quiet in fact I had to look and make sure the fans were running.
Did you look and see that the fans are not rubbing against the grille?
Previously, I received one of these that the grille that covers the fans was slightly bent, causing the fan blades to rub, that one made a wicked noise.
Art