PowerPC :: IMac G5 Fans Are Running Out Of Control Constantly?
Jul 8, 2007
What is wrong with this picture? The fans are running out of control constantly. This machine is sooo loud. The power supply was just replaced, which did little/nothing. Reset all ram/etc.
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Jan 19, 2009
My PowerMac's (G5 Dual 1.8GHz procs) fans seem to run at a solid 4k rpm's regardless of what I'm doing, even with CPU usage set to low. I've taken the whole machine apart, cleaning it with canned air and such, but the problem just won't leave me be. The air coming out of the machine is ice cold, and the temperature readings I'm getting are about 86 degrees F for the CPU's and 70 for the HDD, so I'm not sure what gives.. Slot and Backside fans are running at 255 rpm, but the others are all 4k.
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Apr 21, 2012
I've just bought a second hand macbook pro, the battery is dead which is easy to replace i guess but worse the fans are running constantly at around 6000rpm.I've tried resetting the smc and pram but that hasn't helped.I tried to run the hardware diagnosis but that freezes when it gets up to testing the logic board and i have to pull the power adapter to turn machine off.I only have the second of the two install dvds and machine is running os x 10.5.8
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Jun 18, 2009
I noticed that my GPUs fans (either ATI 3870HD or 4870) in my MP 1,1 are considerably louder nonewithstanding nothing CPU/ GPU taxing is running. Anyone else noticed this? Are the GPU drivers not finished yet or is it due SL keeping them under load for Open CL/ Grand Central?
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Oct 24, 2009
I need the thoughts and advice from your seasoned Mac people - I have 2 MBP's - 1 15" aluminum, one last years model 17" Unibody (with Black around screen). The 15 has run great since day one. The 17" was ok, but now is locking up and causing me to reboot, fans seem to run on high all the time, and it is very slow to react while using the OS, it gets worse until it locks up. I have upgrade to Snow Leopard thinking that that might fix it, but it has not.
When I got it, I restored from the back up of my 15" using carbon copy cloner. I only imported users and data such as pictures and music. Do you guys think that this is a hardware issue or a or should I back all my stuff up and then blow everything away and reinstall from the ground up with a fresh SL install?
When I called apple they tried to sell me apple care and told me that it was out of the full warranty and if I send it I would to pay for what was not under warranty. SO I am hoping that someone has seen this and has a fix that I can do without having to take it in.
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Oct 18, 2007
My fans are constantly going on my g4 powerbook and the noise drives me nuts. I do all sorts of work - graphics (CS2), music recording, multimedia... but even when I am just not doing anything intensive the fans are on.
The fans are at full speed now and the temp reads 37C / 98F. I've used an icurve since I got the machine.I've put up with this noisy sound for a couple years now. One person said I need to clean the air vents, like dust is causing the noise. Does anyone know about this?
its a g4 titanium powerbook 867 mhz 768 RAM (ancient I know but it still works!)
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Feb 4, 2009
My parents have an older 20-inch white Intel iMac that has run great through the years. But about a week ago it just started spinning the CPU fans up to 3500-4000 RPMs and it won't bring them back down. Istat shows that the CPU temp is around 90 degrees and the computer remains cool to the touch.
So it isn't overheating. My parents keep it off most of the time because they don't want to ruin it, but they're planning on using it in their business they're trying to start up. We've done some web searches and nothing seems to fix it.
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Jul 28, 2009
The fans on my G5 Pro are running at close to 3000rpm most of the time. I have read other forums and do not think this is normal at all. I started looking into the fans because I am getting frequent kernel panics (black screen crashes) and thought it might be the machine over heating. My CPUs are at about 50C to 52C and the fans are constantly running that fast.
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Jul 3, 2007
CPU cooling fans are running at strange different speeds. Powermac G5 early 2005, dual G5 (not dual core).This is at idle:CPU A 60 degree Intake 300rpm Exhaust 300rpmCPU B 63 degrees Intake 1125rpm Exhaust 1100rpm! I have not noticed this before. They usually remain identical.
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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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Mar 20, 2012
The fans on my 3.06 GHz Intel Core i3 imac run almost constantly and at high speeds. I have reset the SMC, fixed permission, and tested the disk. Also, I downloaded SMC Fan Control. Here are my current readings will the fans are blasting:
ODD: 994
HDD: 5577
CPU: 1200
Temp: 44C
Info:
iMac, Mac OS X (10.7.3)
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Dec 16, 2008
Originally my iMac G5 (1.6 GHz 17 inch) was failing to boot up. It would get to the grey screen and the apple and it would just stay there and pretend to be a rocket ship with it's little fan whirring as fast as it could after five minutes. So I reset the SMU, fan stopped, still wouldn't boot. Booted it off the 10.5 install cd (which it was running fine until it wouldn't start up). It wouldn't see the Macintosh HD for a while unless you went to disc utility > partitions and changed it from current to one and instead of applying just let it sit there before switching it back to current. Took about 10 minutes of sitting there.
I did disk repair said there was no problem. Disk permission repair said there was a few problems and said it repaired them. To be safe I backed everything up using target disk mode (where the fan tried to play rocket again even though I reset the SMU), erased my hard drive and reinstalled. Now it shuts down randomly when it goes idle, and takes 10 minutes to start up past loading the dock to load the apple bar Mac HD icon and whatever is on the desktop (which is a single empty folder).
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Dec 1, 2009
I have an older PowerPC G5 with dual 1.8 GHz. Recently I replaced the Power Supply and now the two fans on the back run at high speed all the time. There is no heat problem anywhere. In fact after an hour or two of running I opened the case and everything was cool to the touch. Not even warm! Is there a way I can get the fans to slow down?
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Jul 3, 2009
My Mum has just turned on our family computer- an iMac G5, 1.9ghz 17" (first model with built in iSight).
It gets to the grey screen with the apple, with the loading icon below it, then after about a minute the fans turn out pretty loudly, and it goes no further, just stays on the grey screen.
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Sep 9, 2009
Both my left and right fans are constantly running at 2000 rpm. They have not done this before, but over the last week I have noticed this issue. Heat does not seem to be an issue in triggering the fans. I'm so confused on why they're are constantly on now.No CPU hogging processes or high temperatures.
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Mar 5, 2012
I've had an iMac for just about a year and over time I guess I just didn't notice but the machine always ran very quietly. At the same time the back of the computer would heat up so bad that it would nearly burn my hand if I left it there. Well last week I decided to upgrade to Lion from Snow Leopard and when I did the install failed and froze up the hard drive. I took the computer in to the apple store and they determined that it had to have a new hard drive installed because the old one (only a year old) had a physical malfunction (was broke). So anyway I have my iMac back and get it started up, backed up from time machine, and then finally get Lion istalled - and now all of the sudden I notice that the fans in the computer are CONSTANTLY blowing - I can hear them spinning and can hear the air venting out of the back of the computer - and the computer is STILL really hot on the backside of the screen. Â
So now I am wondering if the originial problem was the computer heating up and if that may have broken the otherwise good hard drive? Also now that I have a new hard drive - should I be concerned about the fans being on ALL the time? I mean they never go off. Even when I leave the computer for hours and come back to it and the screen is asleep the fans are STILL buzzing away at top speed. Here is the stats on the computer at the time that I'm typing this note - there are no other programs running than Firefox and Mail. Also - I don't know what the optical drive is exaclty - but if it's the DVD drive (superdrive) - there is nothing in the DVD disc driveÂ
Info:
iMac, Mac OS X (10.7.3)
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Jul 29, 2008
During the summer, I don't have A/C in my house. My temps were getting pretty high, around 55C/130F for processors and up to 78c/172f for ram. That is pretty high, and I suspect it is because the ambient temp in my room is somewhere in the 90s. I am just very acclimated to the heat, and it doesn't bother me.
I downloaded SMC Fan control and bumped the min fan speeds up to:
1250rpm for Exhaust
1150rpm for CPU
800rpm for Power Supply
1350rpm for HD
This has made a tremendous difference. CPU is down over 20C and ram is down about 30-35C. Are these fan speeds safe? What are the Mac Pro fans rated at, and will the increased speed shorten their lifespan? I'd like to keep these current fan speeds if it is safe.
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Sep 23, 2010
I have late 2008 MBP that run on leopard and I was using fan control (I forget the name) but now I cleaned install SL and I don't have that app. If I keep my MBP on for hours it become hot (around 60-73 c) and before it was cooler (around 40-55 c). Is there other app better then that?
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Feb 16, 2010
Setup: MB Pro. early 2009 2.93 Ghz, 8GB RAM, 2 hard drives via optibay
Request: Utility to better sleep the hard drives/fans when not being used
Problem: With the two hard drive setup, battery life is reduced. I knew this going in. So, I would like to purchase a utility that allows for better management of the MB Pro hardware so that, say when I am only reading something on screen with no needed hard drive activity, the hard drive goes to sleep faster than the current energy management application requires. This would help increase battery life some (not back to pre two drive setup, but better than now). I want to good utility and cost is no object because the cheap, even free utilities I have used in the past on other things like cleaning your mac tend to make the computer act funny (just trust me on this one).
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Jan 6, 2011
Since I updated to 10.6.6 earlier today I've noticed that the fan in my MBA (13" late-2010 model) is running constantly. This is rare -- I hardly ever hear it. I opened activity monitor and 'System' is using 45% CPU time, and it's pretty constant.
I have absolutely no clue why -- there's nothing in console to suggest it's doing some task, and I can't see any other hints. Apart from the noise and the heat (though don't get me wrong -- compared to my old MBP it's not really noisy or hot, but I liked it better when it was totally quiet and cold), it's also killing the battery -- 25% has gone in less than an hour.
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Feb 15, 2008
My OWC RAM is working just fine, but I am growing increasingly concerned about the temperatures at which it runs. I have the 3.0 (120W) MacBook 2008 with 18 Gb RAM (4x4Gb + 2x1Gb apple stock). The RAM in memory module A2 & B2 is getting up to 80 Celsius without even much of a workout on the RAM. What's more, the MacPro fans are not increasing - right now the hottest module is at 76 Celsius and fans haven't increased at all (see screenshot below).
I have installed SMC fan control, which I understand is supposed to set the minimum fan speed, which I have set at 730 because my RAM was running hot even without any workout. How concerned should I be about this? Is this a) a defect in my mac pro b) a design flaw c) a problem with OWC memory, or d) is everything OK and I'm making a mountain out of a molehill?
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Apr 17, 2012
Well my MacPro 2009 has this weird error where the fans will kick in and a restart wont restore them to normal a sleep cycle will though. It seems to only happen with OpenCL intensive apps but not Cuda intensive apps?? this may be random coincidence.
Info:Mac OS X (10.6.8)
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Dec 25, 2010
Both of my fans are running at the max 6200 RPM and have been for well over an hour. My CPU is over 65% idle, and none of my processes are over 20%. My HD Temp is 38 degrees and my CPU temp is 72 degrees. I don't think my fans should be running this high considering the computer is doing so little work.
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Apr 15, 2010
I own a Macbook pro 17" core duo 3.06Ghz. I am very happy with the machine, but since a few months the fan's are louder and on much more often then ever before. (the first half year it was always silent) I remember there was some reset for this.
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Aug 23, 2010
Like 3 days ago I shut down my macbook pro normally. I closed the lid and I noticed that the sleep indicator light was on. I opened the lid and the light went off. I closed the lid again and the light went on again. I got closer to the computer and the fans and drives inside were still running. The only thing I did was to hold the power button down until it shut. This has happened to me 3 times already. I'm kind of worried because I got the computer 2 weeks ago and I'm really happy with it. My computer is a 2010 13' Macbook Pro running Snow Leopard, not sure what version it is.
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Jun 25, 2012
why is my mackbook air fan running all the time?
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Feb 4, 2008
Just wondering if anyone's tried to run Mac OSX 10.5 on their 800mhz G4 and how the performance is (good/bad)? Obviously the cutoff is 867mhz.
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Feb 17, 2010
I'm not sure what the issue is, but my 20" iMac G5 PowerPC is running so hot and smelling very "electrical".
I took the case off the back of it, and it seems where the G5 metal portion (not sure what it's called) is the source of all the heat. I can't really put my finger on it for more than a couple seconds because it's so hot.
Some recent things I've done was lube the fan, and replaced the RAM. I got the RAM per the Crucial ram identifier program that runs on the computer and lets you know which type to purchase.
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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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Feb 24, 2012
Last summer my MBP 2.3 GHz C2D was heating up so much, you barely could touch it. So I decided to give it a little hardware checkup. Finding the fans completely stuffed with dust
But after a while i recognized that the fans went on high rpms (around 6000) already at startup and did not lessen anymore. I do not have any high capacity processes running and the temperatures are not just not warm buth rather chilly, so no need for high fan speed. Now I want to solve this problem as well but seemingly nothing will work.
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Info:MacBookPro, Mac OS X (10.7.3)
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