IStat reporting fan speeds of 999-1199+...

It seems that every time I check iStat, the three speeds are as follows:
Fan 2: 999
Fan 1: 1099
Fan 0: 999
Are these normal operating perimeters? I know that fan 1 cools the gpu, what of the others?
I had one instance where one fan whirled really loud, and was at 3000rpm. Any thoughts on that?

Those fan speeds are identical to my own results from iStat Pro. I believe your Mac is operating within "normal" parameters.
Some folks occasionally report a similar revved-up fan experience. The fans do operate independently from one another and speed up and slow down as the system requires to maintain an optimal internal environment. As long as it returned to a more normal speed, I think all is as it should be.

Similar Messages

Corecenter pro fan speeds

I'm running corecenter pro as MSI told me PC Alert wasn't supported on the Master 2 FAR. I noticed that the CPU1,2 and System fan speeds are ALWAYS 0. When I'm booting and go into the BIOS it tells me the fans are running and they are usually around 1200 rpms, yet Corecenter always reports fan speed as 0.
Is this a known bug in Corecenter?

After a bunch of late night reading, I see it's related to whether or not you let the BIOS manage the temperature or not.
Still a secondary question is why is setting the system fan speed not available to me in the bios? I have a smart fan plugged in and the bios even shows what speed the fan is running at, I just don't seem to have the option to adjust it for temperature and tolerance within the bios area.

Fan constantly running loud - iStat reporting 0 rpm

Hi guys,
hope somebody can help me, my iMac suddenly started to make a very loud noise, the fans are spinning at high RPM!
I already tried to reset the SMC, unplugged my Mac for a couple of hours, plugged it in while pressing the power button - unfortunately nothing helped. When starting while holding the power button, it gets even noisier, therefore i expect only one of the fans is running at full or near full speed constantly.
I now tried to install some hardware monitors to check on temperature/fan speed. iStat nano is reporting low temperatures, but the strange thing is that it gives 0 rpm for the CPU fan, even though its clearly running at high revs...
I don't have Apple care and my iMac 24" is now roughly two years old. Any help is highly appreciated!
thanks,
A

Try doing a SMC AND PRAM reset by:
1. Turn off your iMac and unplug everything from it for 30 seconds.
2. Plug in the power cord, keyboard and mouse only.
3. Press the power button and immediately hold down the Option, Command, P & R keys until you hear the second gong then release the keys. Your machine will start up normally, then check for the issues you are having.

Fan Speed ( RPM ) Istat Pro

Hi, Have a new macbook, and im running istat pro in dashboard, if anyone is using istat pro as well , can you please post your exhaust fan speed here, mine always runs between 1903-2003 rpms. I just want to compare speeds and make sure my unit is not running hot all the time! Thanks in advance!

Mine is sitting on exactly 2000 rpm right now just browsing this forum. I cannot hear it at all. Do some video encoding and you will see it get up in the 5000 rpm range. Even at that speed, it is no where near as loud as most PC laptops.

IMac (Late 2006) fan speed is 4600 rpm and nothing will change it

I just brought my iMac 24" 2.16GHz Late 2006 back from the Apple Store today and the ODD fan is running at 4600 rpm!!! The noise it generates is way too loud. It is comparable to the wind tunnel G4 I replaced. Any thoughts on how to lower the fan speed?
I took the iMac in on 12 Sep to repair microphone and video crashes. They repaired the mike and replaced the video card with an NVIDIA GeForce 7600GT. I picked it up on 3 Oct.
I have SMCFan and iStat Pro installed to monitor and adjust the minimum fan speed. I tried the usual troubleshooting steps (e.g., reset PRAM, Safe Boot, ran troubleshooting utilities, etc. to no avail.
bill

David,
Looking through my old posts to refresh my memory, my face is red as *I AM* mistaken:O
http://discussions.apple.com/thread.jspa?messageID=4064287&#4064287
I was recalling that Intel iMac users were doing the wrong SMC result three years ago (actually they were doing the SMU reset that was for the pre-Intel G-5 iMacs), and that you and I explained to them the correct way - which is of course what you recommended above:D
Nevertheless, since there is no further risk of causing the fans to race in this instance, I would myself do the wrong SMC reset method, and if it does not work, turn right around and do it the way Apple recommends. This still might result in correcting the problem.
By the way, it was widely reported three years ago that the SMC reset was frequently not successful on the first attempt, so the alternative is to try this harmless procedure at least several times before giving up on it.
Message was edited by: myhighway

Unusual Fan-Speed (up to 6200rpm @ 92°CPU), MBP 2011/ OSX 10.10.2

Dear Community,
I've got a problem with my MacBook Pro (late 2011) [2.4 Ghz/ 16GB RAM (upgraded)/ 256 GB SSD (upgraded)/ 500GB HDD (internal, upgraded (instead of DualDrive, iFixit-slot)).
Since last week I am observing that the fan of my Macbook revs up pretty high and pretty quickly up to 92° CPU temperature @ 6200rpm of the fan according to iStats Pro. This can happen in idle as well as load of any kind. I already cleaned the fan. Never experienced it before. Pretty unusual behaviour.
Do you have any suggestions/ guesses/ tips/ help for me? Thank you very much in advance.
Here's a copy of an (Etre)Check that I just recently ran. Hopefully it helps:
EtreCheck version: 2.1.8 (121)
Report generated 17 Feb 2015 09:56:42 CET
Download EtreCheck from http://etresoft.com/etrecheck
Hardware Information: ℹ️
    MacBook Pro (13-inch, Late 2011) (Technical Specifications)
    MacBook Pro - model: MacBookPro8,1
    1 2.4 GHz Intel Core i5 CPU: 2-core
    16 GB RAM Upgradeable
        BANK 0/DIMM0
            8 GB DDR3 1333 MHz ok
        BANK 1/DIMM0
            8 GB DDR3 1333 MHz ok
    Bluetooth: Old - Handoff/Airdrop2 not supported
    Wireless: en1: 802.11 a/b/g/n
    Battery Health: Normal - Cycle count 204
Video Information: ℹ️
    Intel HD Graphics 3000 - VRAM: 512 MB
        Color LCD 1280 x 800
        S273HL spdisplays_1080p
System Software: ℹ️
    OS X 10.10.2 (14C109) - Time since boot: 0:14:0
Disk Information: ℹ️
    M4-CT256M4SSD2 disk0 : (256,06 GB)
        EFI (disk0s1) <not mounted> : 210 MB
        Recovery HD (disk0s3) <not mounted> [Recovery]: 650 MB
        Macintosh HD (disk1) / : 254.87 GB (32.70 GB free)
            Encrypted AES-XTS Unlocked
            Core Storage: disk0s2 255.20 GB Online
    ST9500325ASG disk2 : (500,11 GB)
        EFI (disk2s1) <not mounted> : 210 MB
        Boot OS X (disk2s3) <not mounted> : 134 MB
USB Information: ℹ️
    Apple Computer, Inc. IR Receiver
    Apple Inc. FaceTime HD Camera (Built-in)
    Logitech USB Laser Mouse
    Apple Inc. Apple Internal Keyboard / Trackpad
    Apple Inc. BRCM2070 Hub
        Apple Inc. Bluetooth USB Host Controller
Thunderbolt Information: ℹ️
    Apple Inc. thunderbolt_bus
Gatekeeper: ℹ️
    Mac App Store and identified developers
Kernel Extensions: ℹ️
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Launch Daemons: ℹ️
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    [loaded]    com.google.keystone.daemon.plist [Click for support]
    [loaded]    com.microsoft.office.licensing.helper.plist [Click for support]
    [loaded]    com.oracle.java.Helper-Tool.plist [Click for support]
    [loaded]    com.oracle.java.JavaUpdateHelper.plist [Click for support]
    [loaded]    com.sibelius.sari.plist [Click for support]
    [loaded]    com.sibelius.sibelius6.plist [Click for support]
    [loaded]    com.wuala.WualaFS.KextLoaderHelper.plist [Click for support]
    [loaded]    org.cindori.AuthHelper.plist [Click for support]
    [loaded]    org.cindori.TEAuth.plist [Click for support]
    [loaded]    org.macosforge.xquartz.privileged_startx.plist [Click for support]
User Launch Agents: ℹ️
    [loaded]    com.adobe.AAM.Updater-1.0.plist [Click for support]
    [loaded]    com.adobe.ARM.[...].plist [Click for support]
    [failed]    com.google.GoogleContactSyncAgent.plist [Click for support]
    [loaded]    net.tunnelblick.tunnelblick.LaunchAtLogin.plist [Click for support]
User Login Items: ℹ️
    iTunesHelper    Application (/Applications/iTunes.app/Contents/MacOS/iTunesHelper.app)
Internet Plug-ins: ℹ️
    FlashPlayer-10.6: Version: 16.0.0.305 - SDK 10.6 [Click for support]
    Default Browser: Version: 600 - SDK 10.10
    AdobePDFViewerNPAPI: Version: 10.1.13 [Click for support]
    AdobePDFViewer: Version: 10.1.13 [Click for support]
    Flash Player: Version: 16.0.0.305 - SDK 10.6 [Click for support]
    o1dbrowserplugin: Version: 5.40.2.0 - SDK 10.8 [Click for support]
    QuickTime Plugin: Version: 7.7.3
    Scorch: Version: 6.2.0 [Click for support]
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    SharePointBrowserPlugin: Version: 14.3.9 - SDK 10.6 [Click for support]
    JavaAppletPlugin: Version: Java 8 Update 31 Check version
User internet Plug-ins: ℹ️
    BlueStacks Install Detector: Version: Unknown
Safari Extensions: ℹ️
    WOT
    Ghostery
    Blur (Formerly DoNotTrackMe)
    Twitter Disconnect
    Google Disconnect
    Facebook Disconnect
    AdBlock
    JavaScript Blocker
3rd Party Preference Panes: ℹ️
    Flash Player [Click for support]
    GPGPreferences [Click for support]
    Java [Click for support]
    M-AudioFastTrack [Click for support]
    Native Instruments USB Audio [Click for support]
    Xmarks for Safari [Click for support]
Time Machine: ℹ️
    Skip System Files: NO
    Mobile backups: OFF
    Auto backup: NO - Auto backup turned off
    Volumes being backed up:
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    Destinations:
        Time Machine [Local]
        Total size: 1.50 TB
        Total number of backups: 14
        Oldest backup: 2014-10-28 14:02:40 +0000
        Last backup: 2015-02-15 19:01:58 +0000
        Size of backup disk: Excellent
            Backup size 1.50 TB > (Disk size 254.87 GB X 3)
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         8%    WindowServer
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    Feb 17, 2015, 09:45:07 AM    /Library/Logs/DiagnosticReports/NotificationCenter_2015-02-17-094507_[redacted] .cpu_resource.diag [Click for details]
    Feb 17, 2015, 09:44:47 AM    /Library/Logs/DiagnosticReports/rpcsvchost_2015-02-17-094447_[redacted].cpu_res ource.diag [Click for details]
    Feb 17, 2015, 09:41:50 AM    Self test - passed
    Feb 15, 2015, 08:00:51 PM    /Library/Logs/DiagnosticReports/???_2015-02-15-200051_[redacted].cpu_resource.d iag [Click for details]
    Feb 15, 2015, 07:50:40 PM    /Library/Logs/DiagnosticReports/???_2015-02-15-195040_[redacted].cpu_resource.d iag [Click for details]
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    Feb 14, 2015, 03:43:48 PM    /Library/Logs/DiagnosticReports/???_2015-02-14-154348_[redacted].cpu_resource.d iag [Click for details]
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    Feb 14, 2015, 03:38:45 PM    /Library/Logs/DiagnosticReports/mdworker32_2015-02-14-153845_[redacted].crash
    Feb 14, 2015, 03:38:35 PM    /Library/Logs/DiagnosticReports/mdworker32_2015-02-14-153835_[redacted].crash
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Thank you very much for your answer, OGELTHORPE.
I actually did reset the SMC several times the last few days and also observed unusual behaviour by the use of the Activity Monitor – with no result.
The CPU temperature as well as the fan speed can be at a top level without many processes at all. Happened right before I posted my question just after the last start of the system. Of course it also happens when I run a whole bunch of applications, but even in that case it differs. Sometimes it goes up, sometimes it's totally normal. That's why I called it "unusual".
Any further ideas besides the SMC reset?

A1212 Macbook Pro Cooling Fan Speed / SMC / Service Battery

Background:
I've owned my A1212 Macbook Pro Core 2 Duo since launch (Thanksgiving 2006 I believe). For some time now the temperature has been quite warm - more recently my right cooling fan has intermittently sounded like a jet engine and failed to speed beyond 1,500-2,000 rpm intermittently.
1. I ordered the correct cooling fan for A1212 right and replaced.
2. When I rebooted Macbook Pro here is what I see for temps in hardware monitor
AMBIENT TEMP 31C/88F
CPU A 44C 111F
CPU CORE 1:36C/97F
CPU CORE 2:39C/100F
"SMART DISK" — [DOES THIS MEAN THERE IS A SENSOR THAT IS NOT REGISTERING]
The hottest temp recorded is 109F/ CPU A temperature diode
The new cooling fan is majorly cooling the mac much better than prior fan.
3. I can't find ANY way to stop the mac from running both cooling fans at 6,000rpm
a) reset SMC (tried holding down power button 20 seconds after disconnecting battery
b) reboot
c) remove smcfancontrol
d) use smcfancontrol
e) monitor with temp monitor, hardware monitor, istat pro
f) no runaway processes - not even hot
4) I notice ( this was also showing up before install of new fan) in my battery icon it indicates "Service Battery" - while I do have a 4 yr old computer there was a recall on batteries so this battery is maybe 3 yrs old and I usually use computer plugged in.
I do not have my snow leopard boot dvd readily available to run hardware test on sensors, however techtool pro does not report any issues. I have not found any terminal commands to force the fan speed down nor any indication I have any apps that are accelerating it.
It appears that my fan speeds are accelerating shortly after power up - before OS X is even loaded completely - and never slow to normal speed except when mac is asleep.
IS IT POSSIBLE TO CONNECT THE FAN INVERTED (THE TWO PINS) MESSING UP ABILITY TO CONTROL FAN SPEED?
IS IT POSSIBLE THAT I INADVERTENTLY BROKE SOME SENSOR "SMART"?
I am thinking more and more that this is hardware related like a sensor. Any assistance would be greatly appreciated, while I don't have a Jet engine I have a very noisy mac

Hi N,
SMART reports on a number of checks on the HD. I don't believe that's any part of the current issue.
I agree with you that my first inclination is toward a sensor issue; by default, if the sensor's are not reporting properly, the fans run full speed/6000RMP.

Monitoring Fan Speed

Is their already a tool availible that can Monitor the Speed of the Fans?
In "iStat Pro" their is a field prepared but the Fan Bar is empty
Who helps me?

Hi Bucky,
I am glad that you like smcFanControl.
About interaction with the CPU temperature:
I decided not to go this route, cause of two reasons:
a) reading out the CPU temperature does not always work. Some macbooks stop reporting CPU temperature after some minutes. So it's not reliable.
b) Interacting with the CPU temperature means you disable automatic fan control and adjust it automatically. This however means if you let the user set the values for any given CPU temperature, the fan speeds might be to low and there is a risk of hardware damage. Another risk might be, that the smccontrol app crashes and while automatic fan control is disabled the fan gets stuck at a certain speed, though the load and temperature is getting higher
It's still not clear which fanspeed is default for which temperature as set by apple. So I decided to just make the minimum fan speed adjustable and let automatic fan control be active - to be on the safe side:)

First Backup on Time Machine - CPU temperature and fan speed

I attached my external WD drive and started Time Machine. Works just fine however I watched the cpu and temp and fan speed as reported by iStat.
During the hour long "first backup" I reached an incredible 160 degrees cpu temp and 6000 rpm fan speed. Cpu was 70 percent or so. When this temp was reached it looked like some limiter took over to reduce cpu consumption and temp. CPU dropped to 30 percent and the temp came down. Fan rpms reduced as temp did.
I don't know if iStat reports the feeds on a MacBook Air properly or not but if so......interesting.

160F is not very high - 160C would be a different matter.
Under sustained 100% load, my Macbook CPU is at about 190F, with the fan at about 6200 rpm, in a room at about 68F.

G5 Power Supply Popped - Still works but fan speeds up/slows down nonstop!

Hi,
After applying a security update for Tiger 4.11 on my G5 1.6 a few hours later my machine made a bang/pop sound. It still powers up but once running it sounds like the machine is ramping up to speed and slowing down again. It does this continuously even when machine is running. Apple hardware test reports no problems but i'm concerned. Any ideas?
Thanks.
Dan

I had a similar problem (fans speeding up then slowing down). I have iStat installed so I was able to look at the rpm's of the fan (free widget btw). My CPU fans ranged from 2500 to 3200, oscilated all day long....up, down, up, down ...every few seconds. I noticed my CPU utilization was up, which was odd since my machine was somewhat idel. Looked at Activity monitor and saw my CPU's sometimes reached 90%. The application that was using the CPU's was the printmgr. Stopped the process and everything is ok. I know it is unrelated to the popping sound but you might ck the activity monitor to see what is going on.

About the rules (logic) between the fan speed and the temperatures?

Hello All,
Well, I've had a bad experience with my MBP last week: my motherboard busted and had to replace it... Expensive part to replace!
After thinking about the reasons why it failed, my attention has been directed toward a possible motherboard overheating, which might have damaged the motherboard.
I've installed the iStat Pro widget and regularly monitor temperatures displayed vs. fan speed. I do get a bit nervous when I see a 84 oC CPU temperature and idle (2000 rpm) fan speeds. My GPU temperature is also sometimes in that range.
My questions are:
1) does anybody know the rules (logic) between the various temperatures (CPU, CPU heatsink, GPU, GPU heatsink, enclosure, HD, etc.) and the fan speeds?
2) other than with the fews apps out there, is there a way to customize the rules? Is there a text file or a plist file somewhere where I can change the rules?
Thanks!

If your idle speeds are 2000 rpm, you have one of the original Core Duo MBPs. For me, I see fans on my 17" CD MBP speeding up once temps get into the upper 70s °C.
Apps like smcFanControl allow you to alter the setpoints. Note that some users who installed smcFanControl, then uninstalled it, report symptoms like yours - namely, the fans remain at idle no matter how hight the temps get, until a thermal shutdown is triggered (somewhere close to 100 °C).

Imac high fan speed and goes to sleep 10sec after wake-up

Hi,
Since today my imac's fan speed is high (optical fan and cpu fan speed at: 4000rpm)
Done a hardware test wich gives me 4SNS/1/40000001:IDSR-0.000 indicating something with logic board. According to istat all my temperatures are below 35°C (95°F). istat has readings for the cpu and optical drive temp (both around 26°C)
On top of that if I put my imac to sleep after wakeup (give or take) 10sec later it would go to sleep again. tried the smc reset procedure. no success
Any other tricks to try or just go for an exchange? (imac was bought on 2feb2010)

I've had this problem since replacing the MLB in my iMac a few weeks ago. Initially brought in for repair when the CPU fan came on at 4k rpm and stayed on even after SMC reset and nvram reset. First replacement MLB was a dud, second corrected the fan problems. Now I'm having the sleep issue, I can't tie it to any particular process. Initially I thought it was graphics related as it would go to sleep during graphics intensive work, but yesterday it was doing it when just copying data to an external drive. The temperatures of the CPU and the GPU diode are within spec. I now use a fan controller to keep the CPU fan at 2100rpm and the HD fan at 2100rpm and I don't have the problem. From what I can tell now is that a sensor is incorrectly reporting temperatures intermittently. It may not be the MLB or the graphics card specifically, but the cable connecting the sensor to the board. I ran AHT after the last time it did this and it failed a sensor, but after running ASD on the machine it passed all the hardware. I'm bringing it back into my shop later this month and if i can remember i'll post here with the resolution, not much I can do at home beyond software diagnostics.

CPU fan speed help - One fan twice as fast as the other

Hi
I have a Powermac G5 Dual 1.8 that recently started fan revving. I cleaned out the dust inside and made sure CPU performance was set to Highest as recommended here. Seems to have fixed the revving issue so far but iStat Pro is reporting CPU B's fan speed is twice that of CPU A's despite the temperature being similar (B's is always higher by a degree at most). CPU A's fans are running about 1000 rpm while B can be between 1500 - 1900 rpm. This is with the system performing some graphics task not when it's idle. Idle they are more even.
Only thing I can see is that CPU load is marginally different in Activity monitor with the top graph (doesn't say which CPU it is) being a little more than the lower graph, not be much though.
Does this indicate a problem in waiting? What else can I do to check things?

Hi. You could get a second opinion by running Hardware Monitor
http://www.bresink.com/osx/HardwareMonitor.html
Window > Show Overview will enable monitoring of the sensors and fan speeds, and comparison of the CPU A & B read-outs.
You can also create artificial sensors for Processor Load A & B in Preferences > Probes. These can then be compared to the other readings for CPU A & B in the same Sensor Overview window. Good Luck.

Tweak the balance between fan speed and CPU temperature / Dell M6400?

Hi all,
I have a Dell Precision M6400 17" laptop. It runs really well on Arch, but is a bit noisy. It has always been noisy, btw, but I recently noticed that the CPU fan was blowing a lot of air even though the CPU temperature is lower than 70°C. I also have a macbook air, and its CPU runs at 70°C all the time, which seems to be normal. I would like my m6400 to behave similarly, and I'm sure someone here know how to change that
Hardware configuration
* Intel(R) Core(TM)2 Extreme CPU Q9300 @ 2.53GHz
* Quadro FX 2700M (G94M)
* 8Go RAM
* 2 hard drives
lspci output
00:00.0 Host bridge: Intel Corporation 4 Series Chipset DRAM Controller (rev 03)
00:01.0 PCI bridge: Intel Corporation 4 Series Chipset PCI Express Root Port (rev 03)
00:1a.0 USB controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #4 (rev 02)
00:1a.1 USB controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #5 (rev 02)
00:1a.2 USB controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #6 (rev 02)
00:1a.7 USB controller: Intel Corporation 82801I (ICH9 Family) USB2 EHCI Controller #2 (rev 02)
00:1b.0 Audio device: Intel Corporation 82801I (ICH9 Family) HD Audio Controller (rev 02)
00:1c.0 PCI bridge: Intel Corporation 82801I (ICH9 Family) PCI Express Port 1 (rev 02)
00:1c.1 PCI bridge: Intel Corporation 82801I (ICH9 Family) PCI Express Port 2 (rev 02)
00:1c.2 PCI bridge: Intel Corporation 82801I (ICH9 Family) PCI Express Port 3 (rev 02)
00:1c.3 PCI bridge: Intel Corporation 82801I (ICH9 Family) PCI Express Port 4 (rev 02)
00:1c.4 PCI bridge: Intel Corporation 82801I (ICH9 Family) PCI Express Port 5 (rev 02)
00:1c.5 PCI bridge: Intel Corporation 82801I (ICH9 Family) PCI Express Port 6 (rev 02)
00:1d.0 USB controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #1 (rev 02)
00:1d.1 USB controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #2 (rev 02)
00:1d.2 USB controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #3 (rev 02)
00:1d.7 USB controller: Intel Corporation 82801I (ICH9 Family) USB2 EHCI Controller #1 (rev 02)
00:1e.0 PCI bridge: Intel Corporation 82801 Mobile PCI Bridge (rev 92)
00:1f.0 ISA bridge: Intel Corporation ICH9M-E LPC Interface Controller (rev 02)
00:1f.2 SATA controller: Intel Corporation 82801IBM/IEM (ICH9M/ICH9M-E) 4 port SATA Controller [AHCI mode] (rev 02)
00:1f.3 SMBus: Intel Corporation 82801I (ICH9 Family) SMBus Controller (rev 02)
01:00.0 VGA compatible controller: NVIDIA Corporation G94M [Quadro FX 2700M] (rev a1)
03:01.0 CardBus bridge: Ricoh Co Ltd RL5c476 II (rev ba)
03:01.1 FireWire (IEEE 1394): Ricoh Co Ltd R5C832 IEEE 1394 Controller (rev 04)
03:01.2 SD Host controller: Ricoh Co Ltd R5C822 SD/SDIO/MMC/MS/MSPro Host Adapter (rev 21)
03:01.3 System peripheral: Ricoh Co Ltd R5C592 Memory Stick Bus Host Adapter (rev 11)
03:01.4 System peripheral: Ricoh Co Ltd xD-Picture Card Controller (rev 11)
09:00.0 Ethernet controller: Broadcom Corporation NetXtreme BCM5761e Gigabit Ethernet PCIe (rev 10)
0c:00.0 Network controller: Intel Corporation Ultimate N WiFi Link 5300
output of sensors, idle:
acpitz-virtual-0
Adapter: Virtual device
temp1: +45.5°C (crit = +107.0°C)
coretemp-isa-0000
Adapter: ISA adapter
Core 0: +51.0°C (high = +105.0°C, crit = +105.0°C)
Core 1: +51.0°C (high = +105.0°C, crit = +105.0°C)
Core 2: +48.0°C (high = +105.0°C, crit = +105.0°C)
Core 3: +46.0°C (high = +105.0°C, crit = +105.0°C)
output of sensors when I start interacting (light browsing, mail, chat):
acpitz-virtual-0
Adapter: Virtual device
temp1: +59.5°C (crit = +107.0°C)
coretemp-isa-0000
Adapter: ISA adapter
Core 0: +63.0°C (high = +105.0°C, crit = +105.0°C)
Core 1: +63.0°C (high = +105.0°C, crit = +105.0°C)
Core 2: +62.0°C (high = +105.0°C, crit = +105.0°C)
Core 3: +63.0°C (high = +105.0°C, crit = +105.0°C)
When I start the laptop, its CPU fan stays at its minimal speed only for 1 or 2 minutes, then increases its rotation speed to a second level. It reaches it maximal speed only under heavy load, when the CPU reaches >80-95°C. I would rather let the CPU run a bit hotter before the fan starts to blow: let's say the fan could enter its intermediary speed between 70°C and 85°C instead of 55-80°C, and blow at is its maximum speed beyond that.
I checked the Fan Speed Control wiki page, but lm-sensors is not able to show me the status of the fans. Any idea ?
Aurel.
PS: the temperature of the GPU is not reported by sensors, and nvidia-settings reports around 60°C. Its dedicated fan is very quiet.

aurelieng wrote:
Hi all,
I have a Dell Precision M6400 17" laptop. It runs really well on Arch, but is a bit noisy. It has always been noisy, btw, but I recently noticed that the CPU fan was blowing a lot of air even though the CPU temperature is lower than 70°C. I also have a macbook air, and its CPU runs at 70°C all the time, which seems to be normal. I would like my m6400 to behave similarly, and I'm sure someone here know how to change that
Hi aurelieng,
I'm in the same situation from at least 1 month ( INTEL CORE 2 EXTREME X9100, 3.06GHz with 8GB ram, one solid state disk 128 GB, and one sata disk 500GB)
My dell M6400 has dual boot: ubuntu and windows7. The fan works a lot and continuosly in both environment and this is the reason because I have doubt that the origin of the problem is in hardware problem?
output of sensors when I start interacting (light browsing, mail, chat):
acpitz-virtual-0
Adapter: Virtual device
temp1: +41.5°C (crit = +107.0°C)
coretemp-isa-0000
Adapter: ISA adapter
Core 0: +41.0°C (high = +105.0°C, crit = +105.0°C)
Core 1: +41.0°C (high = +105.0°C, crit = +105.0°C)
Last edited by ginard (2012-11-16 18:09:19)

Fan speed problem Power Mac G5 Dual 1.8 GHz PowerPC - please help

Please HELP, I have a fan speed problem with my Power Mac G5 Dual 1.8 GHz PowerPC
This is a NOT an Intel machine. I am running Mac OS X v10.5.8
Power Mac G5 - PowerMac 7,2 - Power PC 970 (2.2) - 1.8 GHz with 2 CPUs - L2 Cache (per CPU) 512 KB - Memory 8 GB - Bus Speed 900 MHz - Boot ROM version 5.1.5b1
I have included below Links to download a sound file (.m4a) that I recorded of the fan speed problem and both a .pdf and .spx files of my system profile.
download sound file
http://homepage.mac.com/rep3/filechute/myG5dualsFans.m4a
down load .spx file of my system preferences
http://homepage.mac.com/rep3/filechute/systemProfileREP3-G5dual.spx
down load .pdf file of my system preferences
http://homepage.mac.com/rep3/filechute/systemProfileREP3-G5dual.pdf
When did the fan problem start?
After I replaced the mother board on the computer.
Why did I replace the mother board?
Because the experts at apple agreed with my diagnosis that the major crash problems & kernel panics must have some thing to do with a logic board gone bad. They would not work on it, because this Power Mac G5 dual 1.8 GHz machine is now a legacy model.
What I have done to attempt to fix my fan speed problem? yes I checked the obvious things, here is a list:
1) yes I checked to be sure that the new mother board was the same part number as the original one, and that all things that were unplugged from the old mother board - were actually plugged into the new mother board.
2) all the fans work, I can see them spinning if I use a flashlight and look at them (cover on and off to get at some of them)
3) check all RAM to make sure: a) it was installed properly b) that the RAM worked using TechTool Pro c) even started the machine with only the original RAM that came with it.
4) I installed a Temperature monitor - to see if there was something reading as very hot inside that was causing the machine to continually run the fans at a high speed. No, no heat issues that I can see. Here are the reading from the sensors in degrees fahrenheit, 2009-10-11 16:11:01 -0500
CPU A Die Temperature: 75.7℉
CPU B Die Temperature: 81.5℉
Drive Bay: 68.9℉
Main Logic Board Air Inlet: 64.8℉
Main Logic Board Ambient: 73.6℉
Main Logic Board Backside: 76.3℉
Memory Controller Heatsink: 93.2℉
Processor Card A Ambient: 77.5℉
Processor Card B Ambient: 77.0℉
5) zapped the PRAM
6) followed the SMU reset instructions for
Power Mac G5 (Late 2004)
To reset the SMU on a Power Mac G5 (Late 2004) computer, simply do the following:
• Turn off the computer by selecting Shut Down from the Apple menu or by holding the power button until the computer turns off.
• Remove the power cord from the computer.
• Wait two minutes.
• Plug in the power cord.
• Turn on the computer.
7) followed the SMU reset instructions:
Resetting the Cuda/PMU
How to reset the PMU:
• If the computer is on, turn it off.
• Disconnect ALL cables from the computer, including peripherals and power.
• If possible, move the computer to a place where you are not standing on carpet.
• Open the case and ground yourself by touching part of the metal frame inside the computer.
• Find the Cuda or PMU button
• Press the Cuda or PMU button ONCE. Do not press the button more than once before starting the computer up again.
• Wait 10 seconds, then reconnect the cables you removed in step 2 and turn the computer on.
• If the computer still does not respond after resetting the PMU, the computer may require service from an Apple Authorized Service Provider.
8) ran disk utilities, repaired permissions
9) found a setting in the system preferences that a chat room person suggested had something to do with fan speed. In Energy Saver, under options, processor performance was set to highest, I set it to automatic - this did not change anything that I could tell - BTW I checked my other G5 (a single processor that works fine) that is the setting that that it is set to, and it is nice and quiet.
10) restarted the machine, ..
11) found a Fan Control System Update - but it did not install when I tryed to install it -
12) booted from OSX install disk and ran that disk utility
13) used OnyX to fix disk permissions, clear caches and temp items
Nope - still have the same high speed fan problem. ... PLEASE HELP!!
I have been reading in the MacInTouch reader reports - found this: some one said to use this - thermal re-calibration using the Apple Authorized Service Providers' disk - but that's not available, at least I can not find it - anyone? have an answer to finding this - or can do it for me? I am in Chicago.

The Genius at the downtown apple store said that because it's a "legacy machine" they would not work on it, .. so should I push them?
Well, I personally think that's ridiculous, I'd Push them, I'd call AppleCare & talk up the chain if need be... there the ones that have or should have that Disc... man o man... Personally I'll never visit an Apple Store again in my lifetime, maybe try an independent AASP if none of that helps!..
http://tinyurl.com/ykomqkn
Man-o-man, pop my cork before I explode on that one, if I had anything to do with it I'd close that store.

IStat reporting fan speeds of 999-1199+...

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