Software :: IMac CPU Fan Running At Max Speed?
Sep 11, 2009
I have an iMac 2.66 GHz Intel Core 2 Duo running 10.5.8. Yesterday when I brought the machine out of sleep, the CPU fan began running full blast. iStat Pro clocked it at 3890 rpm. (Normally it runs about 1200 rpm.) All other readings, include the CPU temperature, were normal.
After searching some other Mac forums, I cleaned dust from the air vent and then unplugged the machine completely for about 30 minutes. When I restarted, the CPU fan was at its normal speed, and I used the machine for the rest of the evening without incident.
But when I started up the iMac this morning, the fan immediately went back to 3800+ rpm. Again, all other fans and temperature readings were normal. Again I unplugged the machine completely for several minutes, and on the restart the fan was normal. But I don't know for how long.
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Feb 28, 2009
I've got a little problem with my iMac 24" 2.8 GHz Nvidia Geforce 8800GS 500GB. When I start it up, the fans start blowing at full speed. I checked the apple support page for support and found my problem with all the symptoms being correct. The support said I had to reset the SMC by shutting down the iMac, then removing the power cord and all the other one's, wait 15 seconds and then put the power cord and the other one's in respectively. I did this almost 10 times, but my iMac still won't stop making those annoying noises. Maybe it has to do with the SMC fancontrol app my brother installed lately.
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Dec 20, 2007
I am interested in adding a webcam to my desktop Imac (power pc)- Isight is no longer available- an option that I found is the Ecamm Image- but apparently it is USB and not firewire and it will only run with high speed usb- how do I know which type is on my computer? I checked system profiler but quite frankly wasn't sure of the designations.. does anyone have any experience with this camera, by the way? is USB 2.0 by definition "High Speed"?
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Aug 26, 2009
Last night my fan kicked into high gear all of a sudden. I shut it down overnight and when booting up this AM I find it still running on high...quire noisy, of course. Is there something overheating? How to make it run at normal speed?
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Jan 25, 2009
I started video ages ago but the monumental moment was the switch to mac. I started with a 20" Al. iMac with 4 gigs of ram. Started off okay as I was still doing standard definition. Then I went hi-def and I fall asleep during rendering times. It's time to go pro. I will be getting a 8 core 2.8ghz mac pro with 32 gigs ram and 512 video card (NVIDIA GeForce 8800 GT 512MB). What I am asking you guys is what hard drive set up (Solid state and Normal Hard drive) will help accelerate the rendering time?
Here's what I think:
Drive 1: SSD 80gig
used for OS & Apps
Drive 2: SSD 250gig
Used for CURRENT project of the week. Used to read info.
Drive 3: 10k RPM drive 500-1000gig
Scratch Disk for writing/rendering projects
Drive 4: Storage
Keep in mind that I also use shake, quake, logic 8, PS3, and crunch a lot of DVD's to video.
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Aug 1, 2010
I am having a number of problems with my 14th month old Macbook.
My wifi is slow whilst my room mate who uses a PC gets a much faster speed.
My general processing speed is slowing down even though i have done a system clean using "Clean My Mac"
Safari is like a snail so I have given up completely and have been using Chrome which initially was great but the past few weeks it also is slowing down, behaves strangely and wont let me sign into either my Twitter or YouTube but again my flat mate who also uses Chrome but on a |PC has no problem with these.
I am wondering if I have a virus or well honestly dont know what is going on but things are not working as smoothly as 6 months ago and this is not what I expected from a MAC having had years and years of using sluggish PCs.
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Mar 4, 2010
20'' Aluminium iMac, 2.4ghz, 4GB RAM, 2133.
My internal hard drive recently fatally crashed out so I replaced the hard drive with a nice big 1TB one. Since i put the machine back together and reinstalled OSX (Leopard 10.5), this fan has been going constantly:
The one you can see at the bottom there. I guess its the CPU
I installed the iStat widget to check what the temperatures were like inside. I got this back:
By this point I'm assuming the sensor/s is either disconnected or something worse, and the fan is being clever and safe by running all the time. So I open it up and check the connections which seem to be fine, but i give them a blow etc and THEN I got a reading on the temps, and the fan was working nice and calm. I closed her up, and typically, the problem started again.
I assumed that the case had something to do with it, pressing on the sensor or something. Which it wasn't.
I did all the things I did the first time again, but this time with no temperature readings at any stage.
Now I'm not sure what to do. The fan is running at full speed all the time and I have no temperature readings, save the two shown above. I also tried the application 'Temperature Monitor' with the same results.
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Mar 27, 2009
Brand new 2009 octo, with the 2.2x ghz CPUs. Turn it on, start NO apps. Let it sit idle. Within a few minutes the fans ramp up to FULL jet engine speed. I can't hear people on the telephone. And never stop. Let me reiterate that I am running NO apps. My load averages are in the zeros.
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Mar 17, 2012
My iMac (intel core duo) after a hard drive replacement seems to be running the fans at a high rate of speed. Usually just a few minuets after startup. Before the upgrade they were almost silent and now they are very noticeable. I need to get taken care of or just a result of installing a larget hard drive?
Info:
IMac Intel Core Duo, Mac OS X (10.4.10), Ipod 30 Gig, BMW IPod Integration, .mac
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May 14, 2012
My iMac is very slow suddenly. How do I restore its speed? I have emptied cache and reset Safari... what else can I do?
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May 18, 2012
Machine: iMac intel core 2 2.66Ghz Model A1224
sn# YM******ZE3
Ran the hardware test by pressing 'D' key. hardware test came back with error :4SN/1/40000000: T00P-65.250
I am guessing some sort of temp sensor might need replacing.
Info:
iMac
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Jun 5, 2012
I feel like my laptop is starting to run a little slow , how do I speed it up ?
Info:
MacBook Pro (13-inch Late 2011), iOS 5.1.1
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Jun 17, 2012
My 2012 MacBook pro has a fan running on high from the moment I turn it on and my battery has an 'x' on it.
Info:
MacBook Pro
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Jan 16, 2008
Since it has built in graphics, will running a 23" ACD slow the rest of the computer? I'm thinking about Photoshop and Flash here. My work computer is a 15" MBP at 2.0 Ghz and I think a drop to 1.6 Ghz wouldn't be so bad if I could use a separate monitor and not see anymore of a performance drop.
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Jan 5, 2009
I was just wondering if it's okay to run the MacBook with the max fan speed (6200RPM) at all times? It's really hot nowadays and my MacBook runs at about 60 degrees Celsius idle. If I run a few CPU intensive apps, the temperature usually rises to 70-80 degrees. This is with the fan running at max speed. So what I want to ask is, will it be okay to keep the fans running at max speed at all times? I'm going to get a notebook cooler soon so that should help with lowering the temperatures a little lower.
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Feb 16, 2009
If you are watching HD video, CBS.com HD shows for insteance.What speed are your fans running then and what temperature does your MBA Rev B have?
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Mar 4, 2009
I have a Blackbook, it's about 3 years old now and the fan speed has increased to a very high level. There aren't any programs running in the background, this just simply happens when I leave the computer on. I'm assuming it's because there is dust buildup on the internal parts, but it's odd that it progressed from being fine to the stat that it is in today in the matter of days. Is there a way to clean the inside? Apple technician to have a look at it?
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Apr 4, 2012
My macbook is very slow. What should I do?
Info:
MacBook, Mac OS X (10.5.8)
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Feb 8, 2007
I have a MacPro 2.66 quad-core intel. 4gb ram. I have a hard-drive from my old Powermac that i upgraded to 10.5.5 for this computer. Everytime I put my computer to sleep, and then wake it back up. The fans spin up to maximum speed and all the fans are running really loud and then after about a minute all spin to normal speed.
I don't have any other flaws except for this. Why could this be?
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Dec 13, 2009
I just bought the macbook 13" (white casing) today and the first thing I noticed when I turned it on was the fan, it was extremely loud!! I let it run for awhile and it was still constantly loud. Then I tried rebooting twice and still the same problem. My room is only around mid 60F. Is there some function I'm supposed to turn off? Or did I get a lemon macbook?
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Apr 14, 2010
So today I opened up my MBP to clean it out and stuff (it had a ton of dust... A wall of it had built up where the fans blow out)All is fine and dandy now except for one thing. Since I don't want to open my case up for the second time today (right fan wasn't plugged in all the way first time I started it up... oops x( ) I'm asking here since everything else seems to be fine.
What I did:
Opened everything up all the way down to the heatsink.Applied correct amount of Thermal paste.plugged everything back in (right fan wasn't perfect at first, but fixed and stupidly didn't double check everything else while I was in there)
And now both fans are running at 6k (full) constantly. I tried resetting PRAM and SMC with no luck. I'm about to grab my disk 1 and run the diagnosis to see if that turns up anything.Are there any plugs that I might have accidentally not plugged in all the way or at all that would cause this? Also any other suggestions if everything is plugged in correctly?
MacBook Pro 2,2 15.4" late '06
10.6.3
C2D 2.33GHz
2GB Ram
Also, I have iStat Menu. No apps using all my CPU (Mostly <10% usage right now) and temp is mostly <40c right now. All temps have a temperature so I'm assuming all heat sensors are fine.On a great note: My computer is so much cooler now! Even before this at 6k rpm I'd get down to MAYBE 45c if I was lucky.I also have Fan Control installed and it's not having any effect
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Jun 2, 2014
The other night, my MacBook Pro's fans started running at high speed when the computer was asleep. Loud enough to wake me up. And this just kept on going until I finally decided to turn the computer off. Is this normal? Is this anything to worry about?
Info:
MacBook Pro with Retina display, OS X Mavericks (10.9.3)
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May 9, 2012
I recently picked up a 17" 2009 unibody MacBook Pro with Intel Core 2 Duo 2.8ghz, 4gb RAM, SuperDrive and a Samsung 1TB hard drive. The system did not come with the original hard drive and I don't have any other hard drives to test and verify that the new larger hard drive is the cause. I have tried a clean install of Snow Leopard, Lion and even Mountain Lion but no matter what my fans always running at max speed (5k+ RPM). I have looked at iStat and the temps of any of the components in the machine never show more than 42*C so the fans should never be running at full blast. Oddly enough smcFanControl shows 0* temp but fan speds for both left and right are always 5.5k+ and very noisy. Using HDD Fan Control I am able to get at least the right fan to run at a controlable speed but its silence is drowned out by the left fan that still runs on full blast. I have already done multiple SMC resets and PRAM resets with no change in the condition. These noisey fans are driving me insane! I have run every available update as well. Is there a chance that the hard drive or something elses temp not being supported or detectable by OSX is causing the fans to default to the fail safe constant high speed?!
Info:
MacBook
Pro, Mac OS X (10.7.3), 2.8GHz Core2Duo
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Nov 15, 2009
I have a Macbook running Leopard and an iMac running Tiger. I am looking to upgrade Leopard to Snow Leopard and Tiger to Leopard. If I were to purchase Snow Leopard and install it on the Macbook, would I then be able to use the copy of Leopard that came with the Macbook on the iMac? I am not trying to use 2 copies of the same thing on different machines, I just want to put a new os on one machine and move the existing one to another.I am reluctant to purchase the Mac Box Set version of Snow Leopard for the iMac because I do not want or need iLife and iWork.
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Nov 26, 2010
I currently have a early macbook 2008, 2.1GHz, 1GB ram. and im wondering if the base imac is A LOT quicker?
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Aug 16, 2009
I got a iMac on wednesday, everything's been great. Until now. It's been on all day (the problem maybe?) and it now sounds like a fan is catching? I put the fan speeds up to 2000 with smcFancontrol but after 20 secs it goes back down to 1500?
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Jul 28, 2010
Will I see a huge increase in performance with the 3.6GHz Core i5 in the 21.5", or will the 3.2GHz Core i3 be about the same?
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Dec 31, 2010
System Spec: Late 09 21" 3.06, GeForce 9400, 4gb ramCurrently I have itunes and safari running, if i enable the visualizer my imac is noticeably slower, especially when browsing the internet.I thought it might be the fact I was running a second 1080p display from the 9400 would have caused the slow down. But the same thing occurred after i disconnected it. After repairing permissions and restarting, pmram etc.Is the 9400 causing the slowdown? I know its fairly old but itunes visualizer and safari should be quite basic tasks. Its not the end of the world i know but does the 27" imac have similar issues as i plan to upgrade my machine in 2011.
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Oct 31, 2010
I remember reading that the iMac DVD drives are set not to exceed a certain speed so that they remain quiet, but I would rather the occasional disc burns take less time than be silent and keep me waiting. Is there any way to speed this up?
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Mar 12, 2007
Does anyone have any tips to speed up an old iMac G4, 1ghz processor, 512mb of Ram and a hell of alot of applications and video files? (Running Tiger)The main problem is when i open video files and i have multiple numbers of programs open at once.
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