[rescue] FS: Quad-Proc Opteron workstation (new sunhelp.org server drive!)

Patrick Giagnocavo patrick at zill.net
Mon Nov 8 09:36:56 CST 2010

On 11/8/2010 10:34 AM, nate at portents.com wrote:

> "13000 RPM" - wow!
> In my most recent home PC build, I used 120mm case fans with SFD bearings
> running at a mere 1200RPM fans.  The power supply is a 90%+ efficient unit
> which has low-RPM 80mm fans that only run when they need to, and at the
> speeds they need to.  13000 RPM 40mm fans have to be seriously loud... I
> wonder if you could inline some resistors to slow them down and still have
> acceptable cooling?

They use more than one, so the worst of it is the "beat" a/k/a ringing
sound as the fans' noise goes into and out of phase with the noise
generated by the others.


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