HDD Temps - iStat vs. SMC Fan Ctrl

As y'all know, the latest SMC Fan Ctrl allows one to choose which temperature and fan speed to display in the menu bar. I display the HDD fan speed and its temperature. Both iStat Pro and Smc Fan Ctrl show the same fan speed (just over 2000) but vary by 4-5 deg C, with iStat Pro showing the higher temperature. This wouldn't bother me, but here in the Sunny South (ambient 30 deg C) my HDD temperature (according to iStat Pro) flirts with the proverbial 50 deg C limit, running in the 48-49 range. I don't consider this to be a dangerous operating range, but I was just wondering which temperature one might consider to be the more accurate. The 44 deg SMC Fan Ctrl temperature looks a lot better to me. But which to believe?

The reason for the discrepancy in temperature is that SMCFanControl 2.2.2 only reports the CPU heatsink temperature not the associating fan component as you will notice when you change the setting from ODD to HDD to CPU the temperature displayed does not vary. I have a utility called Temperature Monitor installed and setup to display all of the temps in the drop down Menu bar. The temps have always matched that which iStat displays. With that said I would go by what iStat shows rather than the single temp shown by SMCFC.
George

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IStat Pro, SMC fan control and tempuratures

I've been watching the recent temp. problem threads with great interest.
My Imac has had no operational flaws *knock wood* but I'm a bit concerned with the temps which iStat Pro is reporting. For instance;
CPU A 103 F.
CPU diode 133 F.
Ambient 79 F.
Memory Control 112 F.
HD Bay 1 103 F.
Optical Drive 94 F.
WDC WD1600 etc etc, (the hard drive I presume), 99 F.
Most of these temps seem pretty darned high to me. OR, am I mistaken and they are not out of line?
Running SMC fan control at about 1/2 way up on all 3 sliders brings these temps down considerably, but I hate to "over rev" the fans and hasten their demise if I don't have to.
I'll appreciate your thoughts.
Thanks; Jon

Your temps seem low to me but i have no data on what is low or too high
20" iMac 2.4 GHz-2 GB Intel:
CPU....................122F
CPU....................122F
Ambient.............. 79F
Mem..Con........123.8F
HD Bay...............122F
Opt..Dr...............109F
Wireless .............122F
Graph Proc diode.159.8F
Pwr Supply..........161.6F
fans:
998
1200
1200

Monitoring HDD temps & fan speed in DL2100

Can you monitor the temps of the HDD's with software? Does the fan speed vary according to some inside temp or HDD activity? thanks

Hi,I do not really understand if you want to monitor the HDD's with other software or from the NAS.If you want to see the HDD temp, you have Home> Device> Diagnostics > click on the arrow and you will see the temp and FAN speed. Also YES, the fan speed is changing acording to HDD temp

HDD temp sensor

Can anyone tell me how to tell if my HDD temp sensor
is connected, or if it's connected correctly, or anything
would Help.
I've connected a new SSD and HDD in my late 2009 iMac 27,
everything seems to be working OK, I just want to make susure this HDD
temp sensor is hooked up right before I put the LCD. and glass back on.
I'm using an external monitor to test everything as I go.
I've installed iStat pro and it says the SSD is 0 degrees,and the
HDD is 25 degrees. This doesn't make sense to me.
The HDD has what looks like a .1 connector with a double row
of 4 pins. And my temp sensor cable has a similar female coconnector with
only 3 pins per row, with the 2 sensor wires connected in the center.
So I can swap this around 4 different ways. But I don't know how to
to tell when it's right.
Anyhelp thanks.
BTW, the fans are 3900 for the optical, and 1000 or so for ththe other two.
I'm using OS X 10.8

I should also note that I have reset the PRAM and SMC to no avail. Also the system seems to have totally crashed and now if I try to boot from the SSD, I get the prohibited sign, but it will boot from the recovery partition. Running Disk Utility on the SSD from the recovery partition gives no errors.

Is anyone using SMC fan control on their late 2009 iMacs?

I am very concerned about the heat from my iMac.
I have a late 2009 27 inch model.
I noticed a lot of posts of GPU and HD failures.
I bought this iMac used through a certified Apple reseller and I can't afford any problems with this for awhile.
Computer components do not Ike heat.
And despite everything I have been reading in this forum aluminum can retain heat. Not simply vent all of it away from the back casing.
Excessive heat is what shortens the life span of any components In a computer.
Heat in a computer is the enemy!
I do not care what I am getting for temp readings from my iMac.
It's very, very warm and I don't like it and feel it will cause issues in the near future.
I just bought this iMac three months ago and, at least for awhile due to personal health issues, I can't afford to repair a potential failure that might occur in the near future.
I posted a similar thread not long ago but only got one response I was not happy or confident with.
I want to know if anyone is running SMC Fan Controls on late 2009 iMac models and if it has helped and whether anyone had issues with it.
I want my iMac to run cooler than it does now.
I am in a living situation where I have limited means to cool the place I live. The room I am using has no air conditioning only a large ceiling fan and I am running a floor fan. I have a small fan blowing air behind the iMac's case to help with cooling it, also.
Room temps can get into the high 80's.
Also, if you are running SMC Fan Control on a 2009 iMac, could you give an idea what RPM setting you are using for the various fans.
I am a freelance graphic designer, Illustrator, and audio/video guy. Plus I have doing 3D CGI model work for the last few years. I run Photoshop. Final Cut and Blender quite often.
Any real help with this issue would be greatly appreciated!
ThanX.

Even if I had one, I wouldn't run SMC Fan Control. Apple has not released the limits of temperature for any of its Mac model interiors. As such any temperature management is purely guesswork. If you are having serious trouble maintaining an enivoronment suitable for computers, you probably should consider at minimum a window air conditioner unit. http://www.apple.com/imac/specs.html are very particular about the outside environment. If that is not able to be maintained, you seriously need to consider a different working environment.

Reset the smc to clean up after smc fan control?

i have been trying out smc fan control on my MBP to see if i can lessen the heat stress on it. i have removed smc fan control to let the computer handle its own fans (i'm starting to figure it knows more about its own fans than i do). however, now that it is gone, the fans seem stuck on 2000 rpm, even as the temp pushes into the 60-70 degree C range. would resetting the smc get my fans unstuck?
Message was edited by: perezngc

Your RPM and temperature readings seem perfectly normal to me.
If you search these discussion pages, you will see that others think so too.

New iMac 27 i7 and SMC Fan Control

Hi Folks,
As a new iMac owner can anyone tell me if SMC Fan Control should work ok, on my new iMac 27 i7?
Also what is the normal operating temps for this iMac?
Many thanks,
Jim

The first time that you start smcFanControl (smcFC) on a Mac it will read the fans and their base rpms. An iMac usually has 3 fans. I have not heard that the huge screen real estate 27" iMac has more or less. I have also not seen anyone claiming that smcFC "burned out" their fans.
I use smcFC on both my iMac Core Duo (3 fans) and my Mac mini (1 fan). I find it invaluable here where I cannot afford air conditioning. Macs tend to heat up when viewing any sort of video. I have created settings with smcFC that I use when viewing videos that keep the temps inside my Macs close to the operating temps of when I am checking email and surfing the web.
I believe that the above listed temps are the ambient environmental temps advised for using a Mac, not Mac's internal operating temps. 34°C is actually on the low side. My Mac mini runs around 48 usually. If a Mac overheats it will shut itself off. If you find that your Mac is shutting itself off often I would especially look into why. Is it overheating during a particular activity? Does smcFC perhaps help your Mac run cooler during that activity?
Keep your Mac in a well ventilated place with good air circulation, not cramped into a little cubbyhole of sorts. Every year or two have a Mac tech clean it out. They do get dirty inside, even in your clean home or office. That layer of dirt can add a lot to heating up your Mac.
Dah•veed

Question re: fan replacement & smc fan control

hi all,
a few months back, i installed smc fan control and have been using it to run my fans at 6000rpm in an effort to keep my operating temps down (average now is about 115*F).
so, obviously, running my fans at 6000rpm for what is pretty much a continuous time will wear them down faster. my question:
will my fans be covered by apple care? i've got a plan valid for 3 years (i've had my MBP for about a year now). should i expect anything to happen to the fans within this timeframe?
thanks in advance

Hi blikebecks23,
When you start up your computer, it's already at 115 or it climbs to that temperature after normal usage? Personally, that's pretty normal operating temperature for these machines. I went to instal SMC Fan Control prior to responding and with my machine "idle" and having a few tabs open in Safari I'm sitting at 117 degrees and the fans at idle of about 2000rpm.
With that being said, I really don't see the need to run the 3rd party application, the built-in temperature monitoring logic for the machine is adequate enough to properly cool the unit.

SMC Fan Control - MBA 2013

Hi,
Can I ask if anyone has any issue with SMC Fan Control - v2.4 running on the latest MBA 2013?
My CPU Temp shows as "0%" although the fan speed is shown.
On MBA 2012, it works fine.
Thanks
Alan

works fine for me -->
macbook air late 2013 core i5 intel hd 5000 4 gb ram os x mavericks 10.9.1
smc fan control v2.4... maybe try re downloading it
goodluck

Uninstalling smc fan control

i installed smc fan control on my MBP in an effort to keep it cooler. some time after i installed it, i reinstalled my OS in an effort to address some other issues i was having. i didn't uninstall smc fan control before i reinstalled the OS (mostly because i didn't think/know it would be an issue). however, once i finished my reinstall, i noticed my fans never sped up past the 2000 rpm default, even when the computer started pushing into the 160-170 degree range (according to istat). i felt i had to reinstall smc fan control again in an effort to preserve my hardware. i feel now that the computer probably has a better sense of how to use its fans than i do, so i want to uninstall smc fan control and let the computer control its own fan speed. what is the best way to do this?

thanks for answering-- i took a look at this earlier today. i guess the only reason i am trying to find out how to do this is because the smc fan control seemed to have a lasting effect even after i reinstalled my system software (which i assumed would blank everything). do you think dragging it to the trash will take care of it when reinstalling did not?

SOLVED conky hdd temp format

I am trying to display hdd temp in conky as per;
${color slate grey}drive temp: ${alignr}${color lightgrey}${execi 5 hddtemp /dev/sda | cut -c 30-40}
This is the result with odd formatting;
Calling all conky experts!
How do I format this output correctly?:/
Last edited by ancleessen4 (2010-03-02 21:29:36)

If you force UTF-8, it should work afaik. Plus it's the cleaner way .
# Force UTF8? note that UTF8 support required XFT
override_utf8_locale yes

SMC Fan Speed Well Below Minimum

I just downloaded SMC Fan Control. I set the minimum to 4k (left and right) just to start playing around with it. It says its running at 2100ish. Doesn't seem to change no matter what I set the minimums too. Anybody got experience using this app that can help?

I had it when I ran Mavericks and it messed my MacBook's logic board up. Thankfully it was less than a year old. You HAVE to uninstall it correctly or it will prevent the SMC from properly controlling the fan. Just search how to uninstall SMC fan control

Fans dont respond to smc fan control any,ore

Hi,
I was just about to replace my left-hand fan due to loud grating noise but upon removal of the top case and inspection I noticed plenty of fluff and hard debris in the fan bay so removed it, cleaned and the fan works silently now.
Only trouble is, now -even though the fans are at 2000rpm approx I have no control over them as they have stopped responding to the slider/min. speed settings on smc fan control. Is there any reason for this?
Have reset SMC on the MBP using the power button for 5 seconds but no joy.
I konw this forum doesn'y cover 3rd party apps but wondered whether it was a hardware issue first.
Help gratefully received.
Regards,
Ben

I had a similar problem before. Please note that it is important that you uninstall smc program and once then do you do SMC reset.
1. If the computer is on, turn it off.
2. Disconnect the AC Adapter and remove the computer’s battery.
3. Press and hold down the power button for 5 seconds and then release the button.
4. Reconnect the battery and AC Adapter.
5. Press the Power button to restart the computer.
Once you done that you should reset PRAM and NVRAM
Resetting PRAM and NVRAM
1. Shut down the computer.
2. Locate the following keys on the keyboard: Command, Option, P, and R. You will need to hold these keys down simultaneously in step 4.
3. Turn on the computer.
4. Press and hold the Command-Option-P-R keys. You must press this key combination before the gray screen appears.
5. Hold the keys down until the computer restarts and you hear the startup sound for the second time.
6. Release the keys.
Now try to install software again.

I need help with SMC fan control?

I recently installed smc fan control but everytime I open it I can't get the minimum fan speed below 4200 rpm's, anyone have any ideas what I should do?

You don't need smc fan control, just Mac, more accurate to say SMC automatically control fan at proper speed.
If it's not proper speed you think, resetting SMC could solve it.
Intel-based Macs: Resetting the System Management Controller (SMC) - Apple Support

Mac mini with SMC fan control

Just got a new mini a week ago and want to keep it in top running condition, is it worthwhile to use the smc fan control and if so what should I use for settings and any other recommendations.

If you want to keep it in top running condition you best leave this kind of control to the system.
If it is running too fast and noisy for you, then you can slow it down, but of course that will shorten it's life.

HDD Temps - iStat vs. SMC Fan Ctrl

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