Mac pro fan speed

Hello. I've brought my 2010 Mac Pro (purchased new in 2012) to my local apple store twice now. The last time they kept my computer for over a week running tests, wiping my hard drive, and replacing 2 fans in the enclosure. My Mac Pro still has a fan that revs up to maximum speed almost every time I use it, even when I'm not running any cpu intensive programs, and my temps are all low. I have no idea why this keeps happening. I've reinstalled the OS (so did the Apple Store), reset PRAM and SMC, uninstalled software that might have been the issue, and tested my ram. Nothing is keeping this from happening. It revs up to maximum rpm. I'm a composer, and this fan noise prohibits me from working on my music due to the loud fan (which actually emits an F# tone).
I don't know what else I can do besides ask for a brand new Mac Pro. I'm not bringing it to the Apple Store again because they haven't helped.
I'm running Mac OSX 10.7.4
2 x 2.66 GHz 6-Core Intel Xeon
32 Gigs ram
One 3 TB Western Digital HDD
One 128 GB OWC SSD, Two 480 GB OWC SSD
Anyone have a solution to this, besides having to get a new Mac Pro sent to me? Again, it was last at the Genius Bar less than a month ago, and after a week of testing and replacing parts, the problem persists. Thanks for your time.

Fan speed is a function of measured temperature. You may have a bad internal sensor.
The hatter recommends the advanced log-term capabilities of Temperature Monitor in this thread:
Re: Internal operating temperature for my MacPro

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Mac Pro Fan Problem

Hi, I have been having some problems with a Mac Pro I have been working with. At the Start-up the Fan goes to top speed and once it logs-in the fan is still pretty loud. I've checking the Temperature of all the computer parts via a Temperature Diode, and its normal and not high. After searching the internet for hours looking for posts that were for the Mac Pro and not for the MacBook Pro (which comes up in about all the searches using the words Mac Pro Fan Problem) and I found some software all of which is not for Mac Pro's. Is there any application I can run do reduce the RPM of the Fans, Reset the Fan Speeds to only turn on when it get hot, or something along those lines.

Thats odd, seeing as Apple have it listed in the Support article:
To reset the SMC on a Mac Pro:
1) From the Apple menu, choose Shut Down (or if the computer is not responding, hold the power button until it turns off).
2) Unplug all cables from the computer, including the power cord and any display cables.
3) Wait at least fifteen seconds.
4) Plug the power cord back in, making sure the power button is not being pressed at the time. Then reconnect your keyboard and mouse to the computer.
5) Press the power button to start up your computer.
It does exactly the same thing as the SMC_RST button, simply by removing all power from the system. I would assume the reason for this would be that the SMC settings are stored in RAM, which is erased once the power is removed from the board, hence the minimum 15 secs wait which gives time for the capacitors in the power supply and system to discharge.
So yeah, it does do the trick, or has done for me in the past a few times.

Mac Pro, Fans fire up full speed for no reason - randomly!

So, here is another fan issue with the Mac Pro, and I am at a loss. Perhaps someone can help me with this one. I have a Mac Pro I bought in mid '07, dual 2.66 GHz. I have 2 7300GT video cards, which don't have fans of their own to be making the noise...
The computer, when left doing nothing will ramp up full speed for God knows what reason. There is usually almost nothing open for applications, and no major processes running. Menu Meters shows the processor load to be minimal, not a heavy load that would cause heat-issues from processors working hard.
There is really no way to get the fans to slow back down either. The machine is still fully functional, I can open, close or work on software, so nothing is "frozen". I have quit all applications to no avail. The machine will not go to sleep when this occurs, and half the time will not power off using the shut down menu selection either; requiring a forced shut down. Upon reboot, it is fine... (until it decides once again to take off).
This is not the fans roaring when waking from sleep issue, I have had that one as well (bad ram).
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Last night, after I shut down, my fans slowly ramped up into high gear. They went to full rotation, and I let it whirr for four or five minutes, thinking it would shut itself off. It never did, so I just pulled the plug on the CPU. I plugged it back in five seconds later, and it stayed shut down after that.
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Mac Pro Fan runs at full speed!!!!!

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-JK
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My 10K Raptor took a week to 'settle in' (or get burned in) and it did seem to cause a hum from the case. Took out the Raptor, no hum or vibration. I also made sure it was seated tightly, and moved it to slot #4.
I ran a 6 hr ZoneBench 511MB test file 30x using 50 "zones" which gave it a good workout. I then ran Disk Utility Erase and under options, chose 7-way write (took a couple hours was all).
Might want to read the review from SilentPC on the 150GB Raptor series.
New Revision, New Noise?
I was ready to put the Raptor in an external case or something at one point (and people probably remember my posts, was a little over a week ago) but someone else told me to "give it time" and just give it a thorough series of tests (like zero the drive at least once). I always load a drive with large disk images when I first get it before putting it to regular use.

Why does my mac pro fan run at high speed?

My Mac Pro cooling fan started running at high speed. Tried all the shutdown and restart options but didn't help. Suggestions?

The fan runs if something is overheating or if a sensor has failed or there is a problem with the SMC. So, reset the SMC - Intel-based Macs: Resetting the System Management Controller (SMC). If that does not stop the fan from running then check for a runaway application:
Open Activity Monitor in the Utilities folder. Select All Processes from the Processes dropdown menu. Click twice on the CPU% column header to display in descending order. If you find a process using a large amount of CPU time (>=70,) then select the process and click on the Quit icon in the toolbar. Click on the Force Quit button to kill the process. See if that helps. Be sure to note the name of the runaway process so you can track down the cause of the problem.
If the problem still persists then create a new admin user account, logout of your account and log into the new account. See if this fixes the problem.
If none of the above help, then you may have a hardware issue such as a defective sensor.

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I recently visited the Genius Bar at my local Apple store because my Mac Pro's fans were running at full speed after installing 2 solid state drives. The genius told me that it was because the drives themselves are so small they don't touch the metal tab on the motherboard that reads the drive's temperature, so it defaults to running full speed. Does anyone know how to fix this problem? I've tried smcFan Control but it doesn't let me set the actual fan speed. I'm getting 5200 rpms on my Boost A and B fans, and this causes an insane amount of noise. Can anyone help?

Which model Mac Pro?
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I recently picked up a Mac Pro 12core and it's been working amazingly well for the past few months... in the past day or two though the fan has been ramping up to maximum and staying there. When this happens there are no processes taking more than 4% CPU and the system is never less than 99% idle. Resetting the SMC controller solved the issue for about 8 hours overnight, but when I started using the computer this morning the fan ramped up about 15mins into using it.
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CPUs: 23,22
Ambient: 23
HD Bays: 23,25,24
Mem Banks: 22,21,25,25,25,27,27,22
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Hi guys, just bought a Mac Pro off someone. 2006 model, 2.0 quad core.
The guy was running two x western digital 500GB drives. But took them out and replaced it with a seagte ST3500413AS 500gb drive (new).
Mac OSX installed fine. But when i boot it up the fans go crazy! and dont stop.
Did a heat montior test and all looked okay, i think it was 30-50 degrees for every component.
Used istat and the figures for the fans were as follows:
Figures show approx:
Power suply 599rpm
Exhaust 1547rpm
CPU fan 499rpm
HD expansion 2865rpm
Now obviously somethings wrong. I took the drive out and pushed it back in to make sure it made good contact, i have swapped bays etc, same problem.
Any ideas guys?

Launch the Activity Monitor application and select the CPU tab. Click the heading of the "% CPU" column in the process table to sort the entries by CPU usage. You may have to click it twice to get the highest value at the top. What is it, and what is the process? Also post the values for "% User," "% System," and "% Idle" at the bottom of the window.

Mac Pro Fan always on very fast

Hey everybody,
I was searching forums because my Mac Pro 4-core fan was on high speed (2800rpm) from boot for no heat reasons. I then realized my APC 350 Battery Backup/sure protector was insufficient so I got a "550" backup and so far (fingers crossed) everything is fine.
Just wanted to share that with anyone having the same trouble. Cheers!

Your UPS is still underpowered.

Mac Pro fans all of a sudden running extremely loud!

I restarted my computer routinely and when it booted back up the fans started running very loud. They have never run this loud before.
I reset SRC and PRAM as well as replaced the power cord and cleaned the dust out. I also checked that there were not any programs running at high CPU. Nothing new was installed on or into the computer. The computer is not running hot.
I don't know what else to do
The loud fans does not affect the performance of the computer but it's a work from home computer and I need these fans to quiet down!!
This is a MAC pro 1,1 running OS 10.7

Readers have reported "all fans" went to high speed, but on closer examination it sometimes turns out that the graphics card fan, all by itself was making all that noise. If that is the case, the prognosis is very different.
The side door is not interlocked, and can be removed with the Mac Running to determine the exact source of the fan noise.
Caution: The European Commission has determined the anyone living in Europe is not smart enough to keep their fingers out of the plastic fans used in a Mac Pro, so they have been banned Mac Pro silver tower from sale in Europe for over a year now.

X1900 and Mac Pro Fan problems

I just got my new system today.
I transferred all my data from my old G4 tower to my new system.. and all was good. I deleted the data from my old G4 as I am going to sell it soon.
Alas, when I go to try out my fancy smancy new grfx card... I fire up WoW... and futz around for a bit..
the fans are going nutso.. i don't know if it is the ATI card or the system fans... I can't forsee WoW pushing the ATI hardware that much to cause such a whine in the fans..
Anyways, I quit out of WoW.. and fired up the Quake 4 demo I had downloaded. Part way through the screen goes black, as if it went into sleep mode.
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I dread the thought of having to put all 80 gigs of that data back onto my G4 and take this sucker back to the apple store..
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any thoughts?
Mac Pro 2.66 Mac OS X (10.4.8)

First reset the System Management Controller…
http://docs.info.apple.com/article.html?artnum=304123
… and immediate upon booting PRAM and NVRAM…
http://docs.info.apple.com/article.html?artnum=2238
… three consecutive times and see if it helps. Additionally check to see that the graphics card is seated properly.

Mac Pro Fans run extremely high!

Hello,
I'm a video editor working within Adobe Premiere Pro CC, and I edit all kinds of footage from DSLR all the way up to RED 5K. I have a Mac Pro (5,1), 6-Core 3.33Ghz with 32GB of DDR3 ECC 1333 MHz RAM. Also in there is a GTX 770 Graphics card with 4GB on board RAM, and a RAID controller.
The problem is that my system fans are CONSTANTLY kicking up to high gear. Whether I'm doing intensive or unintensive work with any kind of footage. It's always within premiere when they kick on. If I put the system to sleep they all go back to normal, but usually kick back on. It is terribly frustrating.
My system is out in the open, plenty of vintilation, and relatively dust-free.
Recently swtched graphics cards from a Quadro 4000 to this GTX, thinking the Quadro was the culprit, but the problem persists.
I've attached two screen shots of SMC Fan Control before and after the fans kick up to full speed. I don't know anything about the layout of these fans, or what does what. I also can't seem to run Apple Hardware Test to see if everything is fine...I try pressing the D key when booting up, but it just regularly starts up. Any other way to test the hardware?
I realize the graphics card will heat things up a bit, but this still seems abnormal. Can anybody help me troubleshoot? Or at least provide an explanation of the fan layout of the Mac Pro, or list some recommended fan speeds? I just can't seem to figure this thing out.
Thank you so much.

beauleland wrote:
I realize the graphics card will heat things up a bit, but this still seems abnormal. Can anybody help me troubleshoot? Or at least provide an explanation of the fan layout of the Mac Pro, or list some recommended fan speeds? I just can't seem to figure this thing out.
Thank you so much.
It does look abnormal, especially if Activity Monitor doesn't show any processes using much of the CPU's capability. Keep in mind that going full blast, your CPU can show up to 1,200% usage in Activity Monitor (six cores, two threads each).
First, we both have the same Mac Pro with the same amount of RAM. Based on Temperature Gauge (from the App Store), the intended minimum and maximum speeds for the fans are PCI - 750/4500, PS - 750/2800, Exhaust 750/2800, Intake 600/2800, BOOSTA 800/4000.
Working up, the Intake fan is at the bottom of the front grill. The Exhaust fan is at the back end at the same level. You've had the processor tray out. Inside the processor block (the box behind the DIMM slots with horizontal fins) is BOOSTA. There'd be a BOOSTB if you had two CPU's. Those three (or four) fans cool the CPU and RAM. Above all that is the PCI fan, which is set in a bit from the grill and, for some reason, doesn't fill it's space at the front so, theoretically, the air could blow into the PCIe area, make a U turn around the right side and go back through the fan again. Finally, behind the optical drive bay is the PS and the fan is at the front of the PS. There's also a fan on the video card, and I've never seen a monitor which could show that fan's speed or temperature.
I keep an eye on smcFanControl's temperature reading in the menu bar and when it heads north of 100ºF I start going to one of the higher fan speed settings I've established. That's probably being over-cautious but I like my Mac Pro. And if the fans can't do the job, it's time to blow the dust out, and that includes the dust inside the video card.
Hope that helps some.

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Hi everyone,
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Hi everyone,
on my early 2008 Mac Pro i had a problem with a noisy fan. Updated from 10.5 to 10.6.8 and the problem seemed solved.
I decided to upgrade again to 10.9 (i wanted to install Logic X, which would not run on 10.6.8) and now the fan is noisy again.
I checked the activity monitor and there's nothing major going on with the CPU.
Any suggestions?
Thanks in advance
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Mac Pro fans revving after waking from sleep....

Anyone else experience this? Seemed to start after I installed the latest firmware update. After wakign from sleep, my Mac Pro's fans start to rev, but they eventually die down.

Happens all the time. Check out the long thread on "SMC Firmware" for the issues and problems some ran into.

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Hey all,
I've been having some issues with my fan since upgrading to 10.8.4, it's been incredibly loud compared to what it use to be. I typically run very graphic intensive programs and heavy video use but even simple tasks like browsing the apple site with nothing else running the fan slowly ramps up it a distracting volume. You can even hear it in the next room.
I've reset the ram, done a clean instal, blasted out any possible dust, it's in a well ventilated area, even run system hardware tests Nd everything passes I really don't know what else to try? I've searched lots on the Internet and I can't seem to find a solution nor do some others. Some say it will be a fix in a later update? Is this a known issue that needs to be fixed? I miss the snow leopard days :(
Everything was wonderful until 10.8.4...
Any advice or tips would be greatly appreciated I love my macs but can't work with really noisy machines.
Thanks y'all!
Machine specs -
10.8.4 Mac OSX
2x 2.66 6 core intel Xeon
20Gb 1066mhz DDR3
Nvidia quadro 4000
4 hard drives
1 super drive
Running dual monitors
20" apple cinema and 23 LG

I know there aren't 'as many' but it is better now than it use to and you don't need $2000 Quadro 5000 or something, a $600 GTX 680 or somethjng from EVGA will do
Don't know what but MacRumors did a good job on one thread detailing possible GPU AMD FirePro possibilities. Yes it is huge change.
People have always said that about PCs. I have a few. Not for gaming but that is the only way if you want like a small percentage of users, to spend on GTX 690 x 3 for $$$ (big bucks just for gaming).
I can't recall a Mac Pro 5,1 2010 with 2.66GHz (sounds like a 2009) and 12-cores. 2,26 GHZ yes but that is just, does not make sense to give up MHz for more cores. The 12-core 3.34GHZ custom build, yes, but again that was never an Apple BTO choice either.
Apple has always disappointed geekheads you might say.

Mac pro fan speed

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