CPU Fan running really fast even at low temperature.

I bought a HP Envy 700-160eo desktop computer 5 or 6 months ago and for the last 2 months the CPU fan has been running really fast even at low temperature. It's like locked to about 2400RPM as soon as I boot up my PC. Even if I get 30 degrees celcius it runs at 2600RPM. I've tried resetting my CMOS and tried updating my BIOS, but the BIOS update that you are providing me on the HP Envy 700-160eo driver & update section isn't compatible with my PC. The update is for 700-0xx. I've been using the program called Argus Monitor for controlling my fan speed.

I've got the opposite problem, my AMD CPU is running around 55C and the fan hardly ever exceeds 1200 rpm most of the time its running around 950rpm. I think the 48C to 65C is running on the edge of to hot in my opinion, I like to stay around 35C-40C. Motherboard, video card and hard drive all stay in the 30C range. I tried to speed the fan up with SpeedFan program but it can not interface.
I hope someone can give us a answer, I checked the UEFI and could not find any setting allowing controlling fan speeds on my ENVY 700-200z/AMD A10 cpu.

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Need help. I am running a 27 in imac with 16 gigs of ram. Photoshop runs really fast, except when opening files. It takes 5-10 minutes to open even a small file of 1 meg. I cleaned and validated all the fonts and removed all questionable fonts. Reset pref

Need help. I am running a 27 in imac with 16 gigs of ram. Photoshop runs really fast, except when opening files. It takes 5-10 minutes to open even a small file of 1 meg. I cleaned and validated all the fonts and removed all questionable fonts. Reset preferences and still have problem. Slow to open and in force quit "Photoshop not responding" At this point should I uninstall and start over.

What are the performance Preferences?

Athough there is not much usages in the CPU , but the Fan runs really hard and loud , and i've ready try to reset the SMC ! i don't know what to do !

Athough there is not much usages in the CPU , but the Fan runs really hard and loud , and i've ready try to reset the SMC ! i don't know what to do and i'm very worried.

Nguyen Phuc wrote:
Athough there is not much usages in the CPU , but the Fan runs really hard and loud , and i've ready try to reset the SMC ! i don't know what to do and i'm very worried.
I suspect you didn't reset it right.
Turn off the machine, let it charge up and then try the SMC reset again.
https://support.apple.com/kb/HT3964
Run a Hardware Test
https://support.apple.com/kb/ht1509

24" iMac summer 2008. CPU fan runs at highest speed, some times goes to "sleep" mode. t' is about 35'- 42'C. Run hardware test: 4sns/1/40000000:tlop-130.000, next time 4sns/1/40000000:tlop-128.000 errors. Reinstalled all softwere. Nothing changed.

24" iMac summer 2008. CPU fan runs at highest speed, some times goes to "sleep" mode. CPU t' is about 35'- 42'C. Run hardware test: 4sns/1/40000000:tlop-130.000, next time 4sns/1/40000000:tlop-128.000 errors. Tried SMC, NVRAM, PRAM. Reinstalled all softwere. Nothing changed.

I suspect you have hardware problem with a fan sensor. Doing a software install will not help the machine needs to be taken in for service. If you run Apple Hardware Test in Extended Mode it should reveal the error code. If it does not then run AHT an additional 2-3 times to be sure in Extended Mode. Each pass will take about 30-60 minutes.

CPU fan running full speed after 15 minutes

My 3 month old iMac 24" has just started having fan problems.
Before I went away on a training course, it was working fine. Left it switched off at the outlet for 3 days, now the CPU fan runs full speed after the iMac has been switched on for 15 to 20 minutes.
CPU temp is 24C, CPU heatsink is 28C. Ambient is 17C. CPU fan is 3600rpm. Other fans are normal.
CPU usage is less that 10%. Only Safari is running.
I've tried resetting the SMC - left all plugs disconnected for 15 minutes, reconnected mains power for 15 minutes, reconnected USB, then switched on.
Still the same - OK for 15 minutes, then CPU fan runs full speed.
Anything else that I can try?

I tried again, following your instructions exactly. It seemed to work, running normally for about an hour.
I left all the USB devices unplugged, except for the keyboard and mouse.
I then shut the iMac down, but left the mains power turned on at the wall. When I switched it on again 2 hours later, all was OK for 15 minutes, then the CPU fan ran at full speed.
Shutting down for a few seconds fixes it for another 15 minutes.
I'm wondering if it's a software problem, although I haven't loaded any apps recently, apart from a few monitoring programs since this problem appeared.
Last night I left it running the extended hardware test for a couple of hours, and the fans were fine.
One thing that I noticed yesterday was that the "GPU" temperature readings in iStat were all missing (just "-" displayed) for a couple of seconds when I clicked on Dashboard. Is there a way to keep iStat open while I'm using the iMac?
I think I'll try booting XP and see what happens.

HP Pavilion dv4t-1300 fan is always on even with low CPU

I have a HP Pavilion dv4t-1300 Entertainment PC with Windows 7. Even with a low CPU (around 20%), my laptop fan is always on, and the noise is annoying. Why is it always on? How do I turn it off (I have a separate laptop cooler)?

There's a free programme called speedfan to moniter temps, my fan runs all the time its normal it runs at 30% unless cpu and things get to high temps, you can turn off the fan in the bios but i wouldn't recommend it.

CPU Fan running fast

Hey Guys!
I've some Problems with my IMAC 27" early 2011.
The CPU fan is running at about 3800 RPM even though, the sensors say, the CPU is pretty cold.
Here the Temps that iStat gives me:
HD: 41° C
CPU: 33° C
GPU: 43° C
MEM: 38° C
Optical: 38° C
CPU Usage: User 0-2 %, System 0%, Nice 0%, Idle: 98-100%
The problem occours some 10-15 minutes after I've switched on the IMAC and it stays, even if I restart the IMAC for at least 2 hours. Once the fan is returning to it's normal RPM (after 2 hours or more, mostly after being in Standby), i can work for several days and it doesn't return, unless the IMAC is switched off and on again. I think, the IMAC slows down, when it has this problem. Especially scrolling in Safari is extremely slow then. Sometimes it even stops!
Things I tried to correct this:
SMC-Reset --> Didn't succeed.
Start in 'Safe Mode' --> Well it's running in save mode right now and sounds like a vacuum-cleaner.
Disconnect all externals --> Nothing
Deactivate Time-Machine --> Nothing
P-Ram-Reset (?) --> Nothing
New User Account --> Nothing
I think the problem first started to be there some days after installing Lion. By the way: My MBP 15" Late 2008 runs great with the same stuff on it.
Anybody got any ideas?
Thanks a lot & greetings from Germany!!!

I've got the opposite problem, my AMD CPU is running around 55C and the fan hardly ever exceeds 1200 rpm most of the time its running around 950rpm. I think the 48C to 65C is running on the edge of to hot in my opinion, I like to stay around 35C-40C. Motherboard, video card and hard drive all stay in the 30C range. I tried to speed the fan up with SpeedFan program but it can not interface.
I hope someone can give us a answer, I checked the UEFI and could not find any setting allowing controlling fan speeds on my ENVY 700-200z/AMD A10 cpu.

Edge 130 overheats and shuts down, but CPU fan runs at low speed

Hi! I am having a problem with my Edge E130, running un Windows 8.1 64-bit. When running under high load the laptop will at times overheat so much that the system does a hard shutdown - it simply powers off. I installed Speedfan - it shows the CPU at above 90 degrees celsius. The weird thing is that the CPU fan is not running at full speed. I do not know why. Is there a way to fix this? The fan should at least run at full speed. Thanks in advance!

Thank you for the reply! I can't seem to find a black and white sticker. There is a sticker which is black with light grey text. Is it one of these two numbers? label P/N 0B07208CT1 label P/N 0B95210 I am not using any fan control software. Also, my BIOS version is the latest available from Lenovos support site. (when I update the BIOS last time, the fan was running at very high RPMs for a while during the install. So it seems it would be possible for it to run faster)

Does anybody have problems with the Macbook Pro Retina 15' fans being really loud even when playing flash games like candy crush or tetris?

Hey guys,
So after a few months of using the MBP 15' Retina, I've discovered that the fans are incredibly loud even when playing flash games like candy crush or tetris.. are any of you guys having the same problem? Like all of a sudden from be quiet to unbelievably loud just as the games load. So yeah, hopefully someone has the same problem as I am having.
What I was thinking was that the MBP Retina 15' is such a beefed up laptop, it shouldn't require that much CPU to run flash games that are not even THAT graphically intensive to which making the fans that loud..
Thanks!

Believe it or not, Flash REALLY isn't the issue.
It's hardware makers making devices with less processor performance and requiring software makers to fit into a certain requirements of such. Namely iPhone, iPods and iPads.
Flash is designed to give a lot of features and work across many operating systems, browsers and platforms as a write once solution.
Flash has a certain level of processor performance requirement, which hardware makers like Apple want to build less powerful machines using less expensive processors.
Apple has removed Coverflow 3D effects from iTunes and discontinued the 17" MacBook Pro, leaving only the 15" as having a more powerful 3D capable graphics capability.
So Apple is obviously on a anti-heat/performance quest as they further thin up their hardware, trying to kill Flash by punishing Mac users who want to run it.
Flash runs without a fan sound on my older Mac with dedicated GPU and older OS X verison, no sweat.
Head to your System Preferences > Energy Saver and if you have it, uncheck Automatic Graphics switching, this will use the dedicated GPU and shorted battery life, but if your on power should reduce the heat and fan noise.
Another option is to use SMC fan control and set the fan default speed slightly faster, this will keep the machine slightly cooler and not trigger the higher fan speed as often.
If your running 10.8, you will need to System Preferences > Security > downloads to "Anywhere"
SMC FanControl is over at MacUpdate.com.

IBook not starting, fan going really fast

Hi everyone.
Yesterday something happened. Everytime I try to switch on my iBook G4, the power goes on, but the screen remains black and the fan starts to go really fast, like never happened before even when it was too hot. Yesterday I managed to hear the startup chime, and even once I managed to switch in on, but it lasted for around 10 minutes, and the the screen went black again.
Now I can only hear a sound, like a click (not the start up chime) and then the fan going fast, as I said, but nothing else happens.
Sorry for my English and thanx in advance for any help. It's much appreciated.
Regards.

Did you try booting off of Install disc #1 to see if you have video? If you can, it wouldn't hurt to navigate to Disk Utility and verify both permissions and the disk and repair if necessary. This probably won't solve the problem, but it is good practice to do before and after software updates.
If you can boot off of a CD, you could also try running the Apple Hardware Test and check for hardware problems. Very likely there won't be any that show up, but it will give you some assurance that your hardware has no major problems. The AHT won't find everything, but it does test quite a few things.
If you can boot from a CD, then you could consider doing an Archive and Install, as suggested in the article. It would be best to back up your data in advance if you can. If you have access to another Mac, you might be able to do this using Target Disk Mode. A fresh install of the OS will take care of any corrupted software, especially if it was caused by an update.
If reinstalling the OS does not fix the problem, then it is likely a hardware problem. But given what you have said here, it sounds more likely to be software.
good luck!

Fan runs too fast after SMC update

About a week ago I updated the SMC of my Macbook 7.1 (mid 2010).
I even leaved it sometime (days or weeks) on the list of software updates without installing, as it said I should not touch until it was done and it was to fix some compatibility with hardware that I don't have. So I did it at a time I would not do anything.
Since then, the fan began to work at full speed almost permanently, sometimes it slows down to normal operation (really normal, increase rotation when the device heats up, slow down to 2k rpm when it is cold).
I have formated the HD twice, because I tought that had done something wrong, but the problem persisted, so I used the hardware diagnostics and found two error numbers, one for the fast run:
4SNS/1/40000001:TN1D - - 110.00
And another for the extensive test:
4SNS/1/40000001:TN1D - - 1.000
I searched these numbers but the results are not good nor precise, peaple said it's related to thermal detector or the logic board permanently damaged.
My current SMC version (after the update) is 1.60f6
I don't know the old version of SMC.
I installed iStat PRO widget, from where I can see that all thermometers are operating normally (these must be the source of the control of the fan) and the fan running at 6,200 rpm.
I even tried to install Fan Control system pref component, but it can only increase the commanded speed of the fan at any time, never decrease.
I also tried to reset SMC as said in http://support.apple.com/kb/HT3964 , sugested in https://discussions.apple.com/thread/1306035
Is there a way to roll back to the old SMC version?
Or to install some program to overwrite the wrong control?
Thank you.

you need to bring it to an Apple store or AASP to have it properly diagnosed. Only Apple certified technicians have access to what those diagnostic codes mean.

Fans running too fast-6K rpm

I noticed the fans running fast a couple days ago. There does not seem to be a reason of this—temps are low (I think): nothing is reading higher than 46°.
What might be causing this? What should I do about it? Is there a danger aside from burning out the fans?

There are a couple of other things to try:
Open Activity Monitor and see if you have an out of control process. Select "All Processes" at the top and CPU in the bottom bar. Look for something hogging the CPU. Sometimes a printer process will hang up and do this, but it could be almost anything.
Run the extended version of the Apple Hardware Test. It may be that a thermal sensor has failed or become unplugged, and if so, the fans are set to run all out by default.
Burning out the fans is the first danger. Burning out your computer because the fans aren't cooling it is the next danger.
Good luck!

Are my fans running too fast?

Hello,
recently I got my rMBP; the basic specs, I am really happy with it, no displays issues or any wierd sounds, but when my Mac gets a bit higher load (e.g. playing Trine 2, my MBP gets around 60 degrees celsius at CPU and 65 at GPU) the fans run at around 5000 rpm, while the left fan is alway faster by about 300 rotates. Hands down, the sound is ok, but I am worried about the speed, is it normal to get such high rates? At minimal load, it is about 1900 rpm so you can't hear it all.
Thanks for all your answers

I've seen fan speeds close to 6000rpm reported here, so I wouldn't worry. The computer is doing what it is supposed to do: increase the fan speeds as needed to keep it cool. Enjoy your new computer.

MB 13" late 2007 - fan running really loud

Hi guys!
I've tried to find a solution to my problem around the web, but I didn't find anything what could help. My old MacBook from 2007 started to get pretty loud recently. What I realised, fan is turning on while I'm running internet browser (doesn't matter, Safari, Opera or Chrome). But when I watch a movie, even in 720p, the fan is quite. I don't have much apps on my MB, and I try to run CleanMyMac from time to time.
Is my MB just old (that is a pretty obvious answer), or I can do something to fix it?

There could be a few things going on to cause the symptoms, the fan and likely excessive heat.
If the hard disk drive is relatively full and has little or small available free space, the computer may be looking for places to put swap and temporary files the OS uses, to include those when the OS uses free space as Virual Memory. This would mean more read-write cycles to the hard disk drive, if there isn't enough RAM.
Also if the hard disk drive is getting older and worn, it may be slower and the processor among other things are adding up and generating heat so the fan runs more. An early model MacBook may be a candidate for a larger capacity hard disk drive, & if it doesn't already have it, an upgrade in chip RAM capacity to the max it can use.
There may be a reset, such as SMC (system management controller) that may help. In some cases, though the NVRAM/PRAM reset helps. I had to try both on my MacBook when it seemed the processor cores were alternatingly hotter than spec but without a load. In this case, I suspect my MacBook may need the thermal couple to the heatsinks removed and new thermal paste applied, so any heat may be transfered faster. I used a free utility called 'temperature monitor' that includes temperature monitor lite, a download. It works OK once you figure out the settings, and choose to install extra stuff for intel cpus.
So there are things that could be done, depending on the cause of the symptoms. Going through the long way may include unproductive steps when 'trial & error' is involved, so hopefully there is a shorter recipe.
Good luck & happy computing!

Computer running really fast - eats up battery

I am having a problem with my mac every Monday - It begins to run very fast and the fan starts running and then what was a full battery (5+ hours) drains to 1 yo 2 hours and the entire computer slows down. Could there be a program set to run at this time every Monday - if so what would it be? It happens at the same time every Monday! Should I just take my computer in to be looked at by the Bar and see if they can figure it out. Also I am getting a whining from the speakers (I assume) everytime I bring the computer out of sleep mode or turn it on. It is a high pitched squeal that is quite annoying - what can I do about this and what is it?

Be sure when you check Activity Monitor to pick all processes so you can be sure to see what all is running.

CPU Fan running really fast even at low temperature.

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