I had a quick look around at overclockers (UK) for some quieter fans to replace those on my Xserve's PSU. There is one fan at each end of it. I haven't measured them yet but they look like 40mm fans. They are however, double the depth of a standard 40mm GPU fan, though there is only one blade. The other 'half' has moulded blades which do not move.
These things are seriously noisy. Anyone who has ever heard a G4 Xserve running close up will know the noise I mean and these two little fans are almost entirely responsible for it. I want some quieter ones.
You need to remember that the fans are noisey because they are small and have to cool a powerful power supply. Be very careful about changing fans. If you can cool it another way, go for it, but make sure if you do replace the fans that they more the same amount of air at the same rate. -maestro
I doubt they would help, lol. It is probably a Delta. Thats what they have used the past several years. Can you believe they have used Panaflos! Those are my favorite, the best. Try Sunon for replacements, they are very good and have many sizes. -maestro
I think the reason they are so noisey is that they turn very fast are could be a more efficient design. Are you putting it in an xserve case? If not, change the cooling solution.
Registered: 11/16/07
Posts: 1816
Loc: Florida, USA
The major question is what voltage are they using. Most fans use 5volts and not really loud but with 12volts they spin like the dickens and can be very loud and sound like a wind tunnel.