Mac g5 fan control software
This would have involved buying hardware LaCie Hard Drive in order to back up data. The problem with my Fans reving up has been ongoing until today, when I finally read in Mac OSX Hints and saw the problem and solution addressedby you. It is too bad that no one in Tech Support knew about this. I am sure that other people are having the same problem. Over a month ago, when the I had the same problem on my iMac 20" at home and my PowerMac G5 at work, and tried all three solutions that I found online: My new son was two months old and not sleeping through the night, so I barely used the iMac anyway.
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Now, however, he is sleeping through the night and the iMac fan noise has become terrible. When catching up on my TiVO watching via EyeTV, the fan noise gets so loud it sounds like being inside a jet though admittedly without the low base rumble. I can not hear the audio of the programs, and have to resort to Closed Captioning. The same is true when playing some games, notably World of Warcraft. I can definitely say that these activities were much, much quieter before: In most cases I have noticed, MenuMeters shows the actual processor usage to be quite low: I wonder if perhaps the fans could be keyed to the usage of the graphics chips, not the main CPU.
Has anyone else been plagued by these long-running fan issues? Has anyone with an iMac G5 20", no-builtin-iSight model managed to get rid of all traces of these fan issues? I'm running a 20' G5 imac and the fans are driving me mad. I hope the next update sorts this out. The girl working on it said "well, I guess there is no need to diagnostics! That was about 2 months ago: I have tried all the tricks again, but they don't last for long: Thank goodness I got AppleCare on this unit.
There is another reason why the fans in a G5 will come on and stay on constantly for no reason in particular especially after start-up and it's decidedly low-tech. If you've removed the clear plastic air deflector while delving into the internal workings of the G5, you may have damaged the white metallic self-adhesive strip attached to the lug at the base of the deflector.
I think this strip forms part of a circuit which tells the G5 that the deflector is in place as it should be when the power is on. A damaged strip breaks the circuit and convinces the G5 that the deflector is missing while the power is on and components are in danger of overheating. In response it switches all fans on to full. Smoothing out flat a wrinkled or torn strip can solve this problem. Lost your password? Powered by the Parse. More Mac Sites: Macworld MacUser iPhone Central. Eliminate excess fan noise under After installing Every few minutes, for seemingly no reason at all, the fan noise would ramp to near-max for a few seconds, then spool back down to idle.
G5 fan download, free G5 fan download.
Watching with top , there was seemingly no cause for this activity -- no process was sucking up the CPUs, and everything looked completely normal. Needless to say, this was extremely irritating -- if you've ever heard a G5's fans at maximum speed, you know how loud they can be. It was so annoying I was contemplating downgrading to None did the trick. Then a friend pointed me to another possible solution he found at MacFixIt , involving of all things the Energy Saver preferences. Click the Processor Performance pop-up menu, and set it to either Highest or Lowest -- anything other than Automatic.
Close the panel, and you're done. Not wanting to give up any performance, I set mine to Highest. I made this change on Friday afternoon, and since then, the fans have returned to their pre-upgrade behavior. They now only get slightly louder when I do something CPU intensive, and are at the same nice-and-quiet level the rest of the time. Also see this hint for a possible solution if you have other noises in your G5 that you can't seem to explain or silence The following comments are owned by whoever posted them. This site is not responsible for what they say. Arlo on Nov 07, '05 Pyrrhus on Nov 08, '05 G5Dude on Nov 07, '05 Something to Keep In Mind Authored by: Makosuke on Nov 07, '05 What worked for me when all else failed Authored by: JPBankston on Nov 07, '05 Nothing worked - my fans were at full speed all the time.
Finally, I read this hint at macintouch about disconnecting the power cord and voila my iMac is silent once again.
Eliminaing fan noise on G5s Authored by: JonS on Aug 25, '06 Search Advanced. From our Sponsor Latest Mountain Lion Hints Click here for complete coverage of Lion on Macworld. User Functions Username: Search titles only.
Altering the fan speed of a G5 | Mac Support
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For a better experience, please enable JavaScript in your browser before proceeding. Info on G5 Fans. Thread starter sheriff Start date Aug 28, Hi All, this is my first post on the forum. I picked up a PowerMac G5 cheap from work which they were getting rid of. It looks SWEET and works perfectly but is pretty much useless to me as I mainly use Linux, and have only owned a mac for about 12 months, so I don't have a use for a "classic" mac.
I decided to do a case mod on it. I'll document it on a different thread. I plan on reusing all the fans, and every piece of information I can find on the fans is incomplete, so I decided to share my findings. First of all, the commonly known stuff, pinouts. On my G5, the cables are all black so I'm taking a guess as to which one is pin 1: PIN 1 - Variable voltage power supply speed control input.
This input varies from 3.
Helpful answers
PIN 2 - Speedo. This is an output from the fan back to the controller to feedback the fan speed. I believe they have this separate 12V rail because at the minimum speed the Variable voltage rail dips to about 1. Now some reference pictures of the traces for the speed control and the speedo feedback.
Info on G5 Fans
The two square wave traces are the feedback line pin 2? I can not speak for the community. I do not reuse the G5 fans because of the noise that they generate when run on a fixed DC value. The alternative is to use today's fans that are cheap, low power and quiet; well some are not cheap. I agree with neilheart. I tried to use those fans at my build but they were tooooo loud even if I supply them the lowest voltage they could start spinning about VDC.
So I end up buying some low noise and low spin fans and I replaced the original ones. Yes, it is true we have all replaced our original fans with quiet replacements. I find it interesting however. I guess these waveforms were taken from a running G5 to see what was being delivered? If so, I wonder if the native use of G5 fans being fed with a square wave signal say 5 volts rms results in a quieter use of the the fans than straight undervolting down to 5volts and if so, how much quieter are they?