Hi,
I need some help.
The CPU fan of my iMAC, sometimes, runs at full speed of 4200 RPM.
It is very annoying. I am trying to lower the fan speed through the SMC key programming.
At this moment, some of the SMC key values are below:
F2Ac [fpe2] 4148 (bytes 40 d0)
F2Mn [fpe2] 1197 (bytes 12 b4)
F2Mx [fpe2] 4200 (bytes 41 a0)
F2Tg [fpe2] 4200 (bytes 41 a0)
FS! [ ] no data
The problem that I have is that it seems like I can not change the F2Mx and F2Tg values.
The Fan force bit, FS!, is not readable.
Does anyone know how to control the max fan speed manually?
Thanks..
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 Cpu Fan Speed Control Via Smc Key Programming |
Feb 23 2012, 05:18 PM
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Quote Feb 23 2012, 05:56 PM
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Update firmware.
Or no solution AFAIK.
Or no solution AFAIK.
Пожалуйста, прочитайте ЧаВо!
i3-2120 GA-H61M-S1, Radeon HD6670, ALC887(VoodooHDA 2.8), OS⌘10.8.3 (12D78),OS⌘ 10.7.5 Clover FakeSMC_plugins RealtekR1000v3 Apr 8 2012, 05:39 AM
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I've serviced a few iMacs - those things can tend to build up dust on the ambient sensor (and lots of other parts) - I would recommend running the appropriate ASD, and making sure any temp sensors and fans don't have a significant amount of dust buildup which could cause a performance decline. Good luck.
Mar 16 2013, 07:50 AM
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Firmware update is the best solution to this.
Mar 23 2013, 03:19 AM
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QUOTE (baudinetuwilliam @ Mar 16 2013, 07:50 AM) 
Firmware update is the best solution to this.
This worked for me. Just do the update!
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