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lillynews Level 1 Level 1

I have an older 2007 Mini (2GHz Intel Core 2 duo) that originally came with 1 gb RAM.


When I first got it I was surprised at how quiet it was.  My previous computers all had fixed-speed fans, and the fans on the Mini seemed silent.  They didn't seem to ramp up under even under load.  I didn't even know they did ramp up.


As the HD got close to capacity, the mac slowed, of course.  Trying to extend the life of it rather than buying a new one, I doubled the RAM and put in a 500 gb HD.  (I did this myself.)


This sped the computer up, but I also noticed fan noise for the first time.  All it takes for the fan to ramp up to a high pitched whine is scrolling in Safari.  The fan speed does vary with temperature, and temperature varies with use.


It's so freaking loud that I moved it to under the desk because it annoys me so.



  • Maybe the various upgrades and changes in web pages over time put more load on the processor, but I didn't notice it before the upgrade as the HDD and RAM limitations slowed the computer rather than taxing the processor.
  • The fan ramped before, but physically it was much quieter than it is now (dust/bearings/wear problems).
  • Mac overreacting to temperature.
  • Incompatible hardware.
  • Poor installation of some kind.


Here's a chart of temp vs fan speed (I just sampled some numbers while loading on the mac by opening tabs and scrolling):



Diagnostic things I've done:

  • I checked to make sure the cables were reattached, I made sure the foam "T" was in the same place as before.  Vents are not blocked, no buildup on fan.
  • Did the reset thingie. (unplug, restart -- whatever the procedure was.  I looked it up at the time.)
  • I put the old HD and RAM back in.  Still with the screaming.
  • Did search after search.  Other people who actually had this resoved hadn't connected the cables properly or got fixed with the reset.  Others like me didn't get a resolution.


Any suggestions/advice/sympathy?

Mac mini, Mac OS X (10.6.8)
Reply by den.thed on Jul 29, 2012 11:12 AM Helpful

Have you installed any Fan Control utilities like smcFanControl or Lobotomo Fan Control?


For example I'm happily using Fan Control on my 2010 Mac Mini, but as you can see I have the Lower Threshold set fairly low and the Fan will start ramping up pretty fast if it goes over 51C.


Screen shot 2012-07-29 at 11.02.54 AM.jpg


I also use SMCFanControl on my early intel iMac and both can be somewhat confusing if not used or removed properly.

Reply by BDAqua on Jul 29, 2012 12:15 PM Helpful

1. None of the temps look like a problem.


2. Yes.


3. Temps are lower than normal, fan higher.


Might try SmcFanControl, or the other one as mentioned.

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