Previous 1 2 Next 20 Replies Latest reply: Oct 15, 2013 7:33 PM by WZZZ
Rod Fryer Level 4 Level 4 (1,865 points)

I've been involved with Folding@home (http://folding.stanford.edu/English/Main) for a couple of weeks now, and have been aware of the heat generated while my machine has been crunching data.

 

Today I downloaded the application 'Temperature Monitor' to see what's what. The images show temperatures while data-crunching and then about five miutes after I stopped data-crunching.

 

Temps.png

 

Are the high temperatures, those of the cores in particular, a bit too high for continuous operation? I never shut my machine down.

 

Temperature Monitor doesn't show specified upper and lower limits for any of the temperatures, so I'm quite ignorant of where I stand on this issue.

 

As an extra question, is there a 'Preview' option available when cooking up a post here? I'm sure there used to be.


iMac (Flat Panel), Mac OS X (10.6.8), iMac G4 15"/800MHz/1GB and PowerBook G4 17"/1.33 MHz/1GB
  • X423424X Level 6 Level 6 (14,205 points)

    I'll answer the posting questions...

     

    First you embed pictures in a post by using the camera tool in the posting toolbar.  You png did not appear although your link was valid.

     

    No there is no preview.

  • Rod Fryer Level 4 Level 4 (1,865 points)

    Thanks. Here is the pic:

     

    (To recap - the right hand list is from about five minutes or so after I disabled Folding@home.)

     

    Temps.pngI've re-enabled Folding@home, and at the moment the CPU Core temperatures are 71ºC and 70ºC respectively.

     

    My concern is about how far I can have the temperatures that high over a long period - given that I would hope to have my machine will be folding continously.

  • WZZZ Level 6 Level 6 (12,650 points)

    Those are on the high side. Short term probably not that harmful, but long term they will be killing. In an ideal world a drive shouldn't get much above 45C. Your CPU temps aren't great either. You could bring them down by using smcFan Control and running a small fan at the back of the computer.

     

    Here's my setup using a $10 clip-on fan mounted to a bracket on the wall behind the computer, to avoid vibration. The fan blades are about 6" from the back, and the fan is aimed at the the upper left, in particular, but covers most of the area of the back. I turn it off and on using a power cord inline switch to avoid wearing out the cheap switch on the fan itself. Even in summer, while the back may get warm, it never gets really hot to the touch.

     

    I periodically open the fan up, clean the blades and lubricate the front and rear shafts with a light oil.

     

    IMG_2924.JPG

     

    Here's a link to a thread with some posts of mine on using smcFan.

     

    https://discussions.apple.com/thread/3219643?start=0&tstart=0

     

    And some temps running smcFan. Note: Power Supply Position 2 will read lower than Postion 1, which is nearer the PS.

     

    Temps (summer) screenshot.png

  • Rod Fryer Level 4 Level 4 (1,865 points)

    Thanks, WZZZ.

     

    I downloaded smcFan Control, but nothing happens when I double-click on the app (I put it in the Applications folder). It does have an entry in Activity Monitor, though.

     

    My machine (iMac Intel Core 2 Duo, 2.4 GHz, 4 GB RAM, OS 10.6.8.) was bought in December 2007 - is it compatible with the app?

     

    Also, is the Drive temperature I need to watch out for the one described as 'SMART Disk WDC ... ' etc?

     

    EDIT:  I just found the menubar item! The compatibility question no longer seems to apply!

  • WZZZ Level 6 Level 6 (12,650 points)

    Yes, SMART DISK WDC (Western Digital) is the drive.

  • Rod Fryer Level 4 Level 4 (1,865 points)

    Thanks again, WZZZ. I'll keep an eye on things now I've got smcFan Control running, and see how things proceed.

    I'm keen to not have to withdraw from Folding@home if possible.

  • WZZZ Level 6 Level 6 (12,650 points)

    Just keep the fans at the minimum needed to keep things reasonably cool. You don't want to go overboard and burn them up. The fan at the back can help quite a bit too.

  • Rod Fryer Level 4 Level 4 (1,865 points)

    I've been monitoring temperatures closely over the past day.

     

    I shut down Folding@home yesterday evening, and overnight the temperatures dropped markedly - but that was with the fan speeds increased via smcFan Control. The reading I'm most jumpy about is the one for the 'SMART DISK WDC ... '. With fan speed increased to 2200 rpm it went down to 41ºC.

     

    I subsequently reduced all fan speeds in smcFan Control preferences to their minimum values, and the menubar reading for the HDD now sits at around 1430 rpm, with a corresponding temperature of 53ºC. Seems like the 45ºC you mentioned is unattainable without increasing the fan speed to around 2000 to 2200 rpm.

     

    Might this mean that 53ºC is OK for this machine and its HDD?

     

    I've tried to find out about fan speeds and operating temperatures for my machine but with no luck - yet.

     

    I note that your screenshot shows fan speeds fror CPU, HDD and ODD along with upper and lower limits. I guess that my slightly older machine doesn't have sensors on the fans.

  • LexSchellings Level 5 Level 5 (6,570 points)

    53°C is rather high, it shortens life considerably. Crank the fan up until below 35°C.

    Personally I am not fond of the Bresink Temperature Monitor, and I prefer iStatPro (a -free- widget in Dashboard).

    When you uninstall Temperature Monitor use a -free- app called FindAnyFile to find the numerous entries that Monitor leaves behind.

  • WZZZ Level 6 Level 6 (12,650 points)

    First, to address LexSchellings, Marcel Bresink's Temperature Monitor and Hardware Monitor, among other programs he's developed, are highly respected. Do not uninstall it. It is accurate and causes no problems. I have no idea why he is recommending you uninstall it.

     

    I think you want to keep the drive well below 53C. Running the HD fan at or above 2K is OK short term, but if you keep doing that, that will probably cause premature failure. (That said, fans are a lot cheaper than drives or logic boards.) You could go higher, maybe just not as high as that. I'd aim for something in the neighborhood of 45- 47C.

     

    I note that your screenshot shows fan speeds fror CPU, HDD and ODD along with upper and lower limits. I guess that my slightly older machine doesn't have sensors on the fans.

    No, you have sensors on all your fans. That screenshot was from Hardware Monitor, which includes those while Temp Monitor (free) does not. smcFan should show you all three fan speeds. (I also have iStat Menus, which allows me to keep an eye on things all the time right from the menubar.)

     

    Try running a fan at the back. The aluminum back of the iMac acts as a kind of heat sink. Running a fan there will help dissipate that heat more quickly and keep the hardware cooler.

     

    IMG_2924.JPG

     

    Here's my setup using a $10 clip-on fan mounted to a bracket on the wall behind the computer, to avoid vibration. The fan blades are about 6" from the back, and the fan is aimed at the the upper left, in particular, but covers most of the area of the back. I turn it off and on using a power cord inline switch to avoid wearing out the cheap switch on the fan itself. Even in summer, while the back may get warm, it never gets really hot to the touch.

     

    I periodically open the fan up, clean the blades and lubricate the front and rear shafts with a light oil.

     

     

    If you scroll through this thread, I have screenshots and directions for using smcFan. Bear in mind that the default miniimum fan speeds for your computer will probably be different. Take that into account when establishing smcFan pre-sets.

     

    https://discussions.apple.com/thread/3219643?start=0&tstart=0

  • Rod Fryer Level 4 Level 4 (1,865 points)

    Thanks again, WZZZ.

    I ditched Temp Monitor using App Cleaner, downloaded Hardware Monitor, and am waiting on the unlock code.

     

    I've a better set-up now with SMART: 49ºC(sic) from HM alongside 1797rpm(sic) from smcFC in the menubar. Both readings provide a quick look at how the HDD is doing.

     

    Thanks for taking the time to give me all this advice regarding software, setting it up and so on.

     

    If I continue to be involved with Folding@home, I'll definitely need to get a small fan for the back of my machine.

     

    I await developments.

  • LexSchellings Level 5 Level 5 (6,570 points)

    Wzzz, I said "Personally I am not fond of...": I am well aware that it is not crapware and I did not say that. In general I do not like apps that stray entries all over the place without having a clean uninstaller that's all.

    Secondly there are free apps/widgets that do the same.

    So there is no disagreement between us, I think.

    As for the temps: I agree that a fan is much cheaper than a mainboard (sic) or a diskdrive. I have a central computer here that runs day and night controlling processes, in which I try to keep the disks below 40°C and they run consitently around 35°C (but you can hear the fans). Running windows and temp controllers.

    I agree completely with your advice given here.

    Lex

  • WZZZ Level 6 Level 6 (12,650 points)

    In your first post, you gave no particular reason why you weren't fond of Temperature Monitor. Simply because it doesn't come with an uninstalller shouldn't give anyone reason to be unhappy. Lots of decent apps don't come with an uninstaller.

     

    Saying "...when you uninstall Temperature Monitor..." as you did, seemed a fairly explicit suggestion that it should be uninstalled. I was responding mostly to that.

     

    It is a free program.

     

    I have both Hardware Monitor and iStat Menus. Both paid programs. I actually prefer the latter, since it can be run continuously (in Hardware Monitor the SMARTdrive temp bogs down and stops giving read outs after maybe ten minutes) and show results in a drop-down from the menubar.

  • LexSchellings Level 5 Level 5 (6,570 points)

     

Previous 1 2 Next