I want to manually set the fan to run at full speed before I start a game. This is because the fan kicks in too late to cool the cpu and gpu, and it doesn't go all the way up to 100% speed. Instead, when the cpu or gpu begin to heat up, the fan only comes up to about 50%, and then the system starts to lower performance. Shutdown the Mac using the Apple menu Shutdown command Connect your MagSafe adapter if it's not already connected On your Mac's keyboard (not an external keyboard) press the left side shift + control + option keys as well as your power button, all at the same time Release all of the keys and the power button at the same time. If you are on that doesn't care about fan noise and want 'ALL THE POWER' then running your fans at higher spec to keep temperatures lower for longer may be what you're looking for. And vice versa, if you want quiet operation for a long as possible, then limiting when your fans speed up or slow down may be in your best interest. But be warned!
Active2 years, 11 months ago
I replaced a hard drive in a 2011 iMac (Core i7), though it was a standard hard drive and didn't have a location for the S.M.A.R.T. cord. (Or at least I think that's what it was.) Since then, the internal fan has constantly been running. I don't want the fan to burn out, and it is becoming quite a distraction for the user.
I believe there is a terminal command that turns off the fan, I believe by bypassing the S.M.A.R.T. test, but the Google gods are not forthcoming with this information. Does anybody know how I can turn off the fan?
CajunLuke
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JonathanJonathan
7 Answers
You should definitely try resetting the SMC, since it's a known fix for fan issues.Here are the instructions: Resetting the System Management Controller.
Agos
Manual Slow Down Mac Fan VideoAgos
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Macs Fan Control can set the fan of an iMac (or MacBook, or other hardware) to any speed. The coolest thing that it can also set a fan to sensor-based control depending on your new HDD by reading its S.M.A.R.T. temperature.
This free app is much better and powerful than HDD Fan Control, which is currently deprecated but still costs $35. Macs Fan Control also works under Windows in Boot Camp.
alexwlchan
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GeekUserGeekUser
I Just downloaded the Macs Fan Control to fix a 2010 27' iMac. I have taken my silver beast apart about 5 times, reseating the LCD temp sensor connector, reseating all connectors, SMC resets, NPRAM erases, flex capacitor reboots, and praying to Steve Jobs collective soul to get these damn fans to slow down slow enough so I can actually hear these friggin speakers.
Macs Fan Control allowed the constant rate set for my 2 trouble fans, the CPU fan and the ODD fan. I now have to monitor my temps to adjust my fan speeds, but I don't crush big math all that often. https://newys757.weebly.com/blog/mac-ac650-manual. The free program beats shelling out $800 for a new logic board for a bad temp sensor.
nohillside♦
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Rev CBRev CB
I have tried many different apps to resolve my noisy fan issue after replacing HDD with SSD. I was able to use iStat to determine it was the CPU fan and not the SSD/HD fan. HDD Fan Control did not work nor did SSD Fan Control. I know everything was connected and in place so I know it was not a cable/sensor issue. I have been working on this for hours and finally found this website and downloaded Macs Fan Control, set them to Ambient and instantly, my CPU fan went silent. I have my sanity back. Huge thanks.
GusGus
I had a similar problem, but i did not solve it by shutting down the Fan. Even if that would be possible, i would not reccomend it. Instead you have two options:
I went with solution #1 because it was the easiest solution - the Cable is very hard to find.
J.C.J.C.
Install and use SSD Fan Control that also supports S.M.A.R.T. and it doesn't cost any money.
murrekattmurrekatt
Short out the connector that goes to the hard drive and this will tell the fans to return to normal. It's the absence of a connection that makes the fans spin up.
swartenfagenswartenfagen
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A laptop’s fan speed can influence the computer’s consistency and reliability. A laptop’s fan can be slowed down or sped up based on specific circumstances such as the amount of times the laptop is used. Slowing down the fan’s speed can be useful for reserving processes if the computer is not used often. On the other hand, if the computer is used very frequently, speeding up the fan can help keep the laptop cool.
It is important to find a balance regarding long term fan speed. Constantly adjusting fan speed settings can cause computer problems. Below are instructions that one can follow to adjust the fan speed on one’s laptop. Please read the warnings before proceeding because there are risks that go along with adjusting fan speed.
Warning
It is not advised that one changes the fan speed if noise is the only reason that one wants to decrease fan speed. The laptop is generally cooling the system down when it is making noise and it is very important for the laptop to be cooled down effectively.
The settings on a laptop might have different levels, so it is important to consult the manufacturer’s user manual and read about the settings for the particular laptop model. Be very careful when using any downloaded software.
Never ignore a valid thermal sensor. One must take the sensor into consideration even if it appears to be stuck at the same temperature. Always stay on the safe side. If the battery pack always seems to need the fan to run faster, the the safest choice is to make the fan run faster.
Before manually adjusting the fan speed on a laptop, it is advised that one calls the manufacturer’s technical support so they can walk one through adjusting the fan speed settings. When one explains the problems that the computer is having, technical support should know what to do and what to avoid.
The Quick and Simple Way to Adjust Fan Speed
There are couple of ways to adjust a laptop’s fan speed. First one is via specialized software.
Install the free software FanSpeed. This software will let you control over every fan in your system. It can also read temperatures from the integrated sensors. However you should note that FanSpeed does not support every Operating System and does not support certain models of computers. If you are on Linux you should check these packages and their man pages: lm-sensors and fancontrol. On a Mac computer you should check what smcFanControl can do.
The Longer and More in Depth Way to Adjust Fan SpeedManual Slow Down Mac Fan ArtThis fan speed adjustment method is more in depth and detailed. It is generally safer because one will be taking many more steps to ensure the protection of one’s computer. Locate the laptop’s user or owner’s manual before starting this process. To adjust the laptop’s fan speed, follow these steps:
The BIOS (Basic Input/Output System) in the laptop might have the fan speed. A computer’s basic settings are found in the BIOS. To access the BIOS, shut down the computer and hit the F10 or F2 or DEL (depends by brand and computer model) key right after the computer restarts. If the F10 key does not work, try the Del key or other F keys. The key that one needs to press to access the BIOS depends on the type of computer. One will be able to change the settings after accessing the BIOS by toggling the prompt or drop-down menu. After changing the settings, hit Save. Power mac 4000 user manual. Check whether there is a chipset driver installed on the laptop for a fan. The chipset controls the fan, the network adapters, and sound and video controllers. What exactly the chipset driver controls depends on what is in the particular chipset. Chipsets are on the computer’s motherboard. If there is a chipset driver for a fan, one can adjust the fan speed from there. Manual Slow Down Mac Fan WorkingIf one is unable to adjust or control the laptop’s fan speed, one has the option of keeping the laptop cool by placing a portable laptop cooler under it. This should cool down the temperature of the laptop’s central processing unit. Changing Fan Speed by Lowering the CPU ClockAlmost every fan on modern computers works automatically. If a computer gets hotter, fan speed is increased, if the temperature drops, fan speed is decreased. However some computers do not have properly sized fans or cooling capabilities. In that case you might end up with the machine which produces lots of noise. In order to lower the fan speed on those machines, you need to decrease production of heat, and best way to do it is to lower the CPU clock in BIOS. After that your computer or a laptop will have reduced performance but it will heat significantly lower and fan speed will be lower consequently. Signal That Your Computer Needs Cleaning SessionYou should also not that noisy fans in a computer can be a signal that dust filled interior of your computer case, so the fans can’t properly cool things. In that case you or a computer professional should open the computer and clean interior of any dust particles by using a soft brush and a vacuum cleaner. Comments are closed.
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