[X4U] iMac CPU fan is 3000+ rpm

[Andy]

> The WD drive I replace by a Toshiba drive is responsible that the CPU fan of our 2008 iMac is running at more than 3000 rpm.
> 
> 

One model of iMac (probably this one) had a hard drive with a built in temperature sensor. If you use a standard OEM hard drive the temperature info isn't getting through causing the fans to run at full speed.
Using something like smcFanControl (free) or HDD Fan Control (about £21) which get the temperature info through S.M.A.R.T.
I found HDD Fan Control to be better.


Andy