Low cpu, loud fans

hi,
since a few months my macbook pro has became very noisy, i got only to bars in the activity monitor, but the fans run around 4500 rpm. i tried creating a new user account, and the problem still persists. even in target disk mode the fans run constantly.
i´ve tried all the solutions i found here and elsewhere (zap pram, reset smc), but nothing worked. any ideas?
thanks a lot.

Hi S.U.,
Thanks for your post.
S.U. wrote:
It would be safest not to turn the fans down. Instead, you might want to open Activity Monitor and set up a floating CPU window so you can see if the CPU actually is very active in TDM. Sometimes things use more CPU than you expect.
Unfortunately, I wasn't clear enough in my post. It is the MacBook Pro that is in TDM, i.e. connected as an external drive to another machine (a Mac mini in this case).
I don't think it is possible to run something on a machine whilst it is in TDM mode. In fact, I would have thought that not much in the way of CPU activity would be happening at all on that machine. I guess it runs a small program to perform the TDM operation but that wouldn't be heavily CPU-oriented.
It just seems a lot louder in TDM than 1) when I am using it normally and not doing anything (which tells me the fans aren't at idle speed, and 2) a lot louder than my old PB G4 when in TDM. I'm guessing that Apple just upped the fan speed when in TDM on the MacBook Pros and I'm trying to confirm this by asking others if they experience the same situation.
Does anyone have a (near) silent MacBook Pro when it's in Target-Disk Mode?
Thanks,
Ashley.
PS There's one other piece of information I forgot to mention. The Nvidia chip in the MBP has gone GMA X3100 - that is why I am using it in TDM - so perhaps this is causing problems, as the machine tries to display the TDM graphic using the crippled GPU.

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So quite accidentally one day I held my hand under the left hand side and it completely muffled the whine sound. You could still here the hum and the sound of air but the irritating element was gone. Playing around a little more, I opted to tape a business card under that lower left hand corner, bridging the gap from front to back to still allow an airspace for the fan's suction. It knocks out about 90% of the whine.
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I did experiment with something longer than the business card but I did then see a decrease in cooling capability. The isight models have their suction ducted out the back and I bet that gets rid of that resonance.
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Quote from: RX-8 on 27-January-15, 12:35:27
The latest version of EC firmware on the official website would be okay.
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Even if you can find such fans, they may not fit the internal space which GS70 has, or can't be fasten well on the body.
And I didn't see there's any second source of the fans for GS70.
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1)
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2)
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send your machine to a service centre and ask for an email address to send the files to so the technician can hear what you hear. I recorded it behaving normally as well so they could hear the difference.
The 1st time mine went in it behaved itself for them so they had to give it back to me, that's when I recorded the noises! I emailed the files before I sent my MBP back again, they took one listen and said they'd order the fans, BEFORE I sent it in. They called me to say that the fans were in so in it went for the replacement.
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Alex Cummaudo wrote:
I've noticed that the main fan will spin, on average, at 1200rpm. Is that normal? The iMac is very well ventilated and sits right next to a window...
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Alex Cummaudo wrote:
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Quote
Originally posted by aaaaa
Quote
Originally posted by Stu Online
if the unit is six months old, you should be able to claim one under warranty - MSI will probably suggest you contact your dealer first - though i doubt if dealers will have seperate heatsinks
I got the MEGA from newegg.
I'd rather MSI just mailed me a fan, not a whole heatsink. Bubble wrap one and drop it in a FedEx overnight envelop.
Even if it's under warranty, I'd totally pay for a new one if I could get it fast.
We're talking about a $15 item (+whatever FedEx overnight costs). I don't really care if I have to buy one myself. Unfortunately I looked on the web, and no one seems to sell this exact fan anywhere.
Wow I'm impressed. I phoned MSI USA support, was on hold for
Great job MSI support. I'm astonished it was this easy.

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Computer left on overnight when turned on has a loud fan that keeps getting louder and a long single beep every few seconds that gets gradually louder also

Hi,
Remove the side panel from the case, and look for the heatsink & Cooler for the CPU. Make sure there isn't a wire stuck in the fan and make sure the CPU fan's power cord has not come unplugged from the mobo.
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Hi there,
I have a Imac G5 Rev2 and I read a lot of topics about loud fan noise. I bought an Imac about 4 months ago and the fan noise is a bit louder than when I just got it. What do all the users mean by "loud"? It is only once, when I was running the hardware test, that I heard my Imac did the "airplane" (very loud) fan noise. When I am using applications using a lot of CPU, I hear a louder fan noise but not the "airplane" noise.
Then what is the most reliable program to check the temperature of the iMac G5?
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I have a Rev b just like you and light use the temp of the cpu is 65-68º C while the hard drive is about 53º C. This is the temp as I am using two browsers, with iTunes and MS word open and running.
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38     dynamic_pager             root       0.0      796 KB          2.32 GB
45     blued                     root       0.0      4.9 MB          2.37 GB
46     autofsd                   root       0.0      1.0 MB          2.35 GB
49     SmartwareServerApp        root       0.0      2.6 MB          630.6 MB
50     WDDMService               root       0.0      916 KB          616.4 MB
52     distnoted                 daemon     0.0      1.5 MB          2.35 GB
70     coreservicesd             root       0.3      21.3 MB         2.38 GB
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138    Monitor                   izamarvira 0.0      9.1 MB          970.7 MB
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181    dbfseventsd               root       0.0      364 KB          582.8 MB
182    dbfseventsd               root       0.0      4.3 MB          590.8 MB
183    dbfseventsd               izamarvira 0.0      168 KB          582.8 MB
204    Image Capture Extension   izamarvira 0.0      6.6 MB          2.64 GB
243    AppleSpell.service        izamarvira 0.0      6.7 MB          2.37 GB
491    mdworker                  izamarvira 0.0      21.9 MB         2.38 GB
506    ocspd                     root       0.0      2.5 MB          2.37 GB
529    diskimages-helper         izamarvira 0.0      13.8 MB         2.38 GB
534    hdiejectd                 root       0.0      1.7 MB          2.35 GB
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813    Google Chrome Renderer    izamarvira 0.5      76.9 MB         1.10 GB
816    VDCAssistant              izamarvira 0.0      4.2 MB          2.62 GB
917    Silverlight Plug-In (Chro izamarvira 11.5     215.8 MB        1.36 GB
919    Google Chrome Renderer    izamarvira 0.1      134.6 MB        1.18 GB
920    PepperFlashPlayer (Chrome izamarvira 1.6      145.3 MB        1.22 GB
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958    Google Chrome Renderer    izamarvira 0.1      73.7 MB         1.11 GB
960    Activity Monitor          izamarvira 4.2      21.6 MB         2.74 GB
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Hi,
I had the same problem, one of my fans was making a loud noise even when my computer was just idling. It can occur because you dropped the computer, thus damaging one of the fans, or the fan broke down partially. I took mine to the Apple genius bar and they ordered a new fan for me and installed it in under a week (all covered by warranty). This is likely a hardware and not software issue, the only way for a fix is taking it to a genius bar.

New Loud Fan issue

I have an iMac G5 that had the motherboard replaced in September due to the "infamous" display problem.
Everything has been fine since then except recently, the fan slowly creeps up in loudness. I would say after about 45 minutes of light use (web surfing, say) the fan has become annoyingly loud. The only way to stop this is to either put the iMac to sleep or shut it down. And then if I start up immediately, it will be nice and quiet. But again, after about the 45 minutes, the fan has revved up to annoying loudness.
I did recently install OS X 10.4.3 and this all probably started around that time. I did not have this problem until recently. But I'm unsure if there's a direct relationship.
I have tried the few tips I've read on the boards about dealing with loud fans, but nothing seems to help. I have reset SMU, reset PRAM, reset NVRAM and also tried the MacFixit tip about changing the Energy Saving option from Automatic to something else (like highest or reduced); but none of these things have helped.
This is still under warranty and I could take this in, but I thought I'd try here first before actually hauling my machine in.
Does this sound like a fan problem, a power supply problem, an OS 10.4.3 problem? I have no idea. Any clues anyone? Thanks.

In a situation like this, H L, my first step would be to run "Activity Monitor" (from your utilities folder) , seelct the CPU tab and the "Activity Monitor" Window, and see if anything particular is hogging processor time.
You might also want to select the "memory" tab in the same application and see if any particular program is using a disproportionate amount of memory. (Safari , is one application that can actually turn into a "memory hog" when it has been running for a while.)
CPU "hogging" results in an increased load on the processor, causing increases in temperature and resulting fan activity.
Memory hogging can also increase processor load, but will eventually also cause an increase in HD temperature as more things have to be "paged" to and from the HD by the OS's virtual memory scheme. This can be a particular problem if your HD is getting fairly full (down to its last few gigabytes) as the drive's free space is likely to be badly fragmented by this time.
Cheers
Rod

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