Which fans are too loud? IStat will display the speed for each fan. I'd be curious to see what iStat is showing.Hi, I am having an ongoing problem with fan noise going all the way back to OS X 10.7 - I am now on OS X 10.9. I have tried a few fan apps to adjust fan speeds like iStat, prefpane Fan Control, but none fix the problem. I would like to know if this is a hardware issue I need to look into (i.e. temp sensors) because the noise is becoming very unbearable.
Temp readings for those wondering are CPU A TDiode - 122˚; CPU B TDiode 108˚
They all appear to be going faster than normal. But it's the Booster fans that are really going fast.It is one of the front fans, it sounds like the one next to the GPU. I can write down what iStat displays:
Booster 1 - 2497rpm
Booster 2 - 2497rpm
Exhaust - 956rpm
Expansion Slots - 1202rpm
Intake - 957rpm
Power Supply 748rpm
Those fan speeds are quite strange. Who would have thought an SMC reset would make the Booster fans speed up even more???I o
I did an SMC and PRAM reset just a couple hours ago. Reading now are:
Booster 1 - 3764rpm
Booster 2 - 3762rpm
Exhaust - 671rpm
Expansion Slots - 1229rpm
Intake - 671rpm
Power Supply 764rpm
CPU A 133˚F/56˚C
CPU B 116˚F/45˚C
Sorry to hear about your fan speed problem. Though this may not be the solution, you can try a SMC Reset http://support.apple.com/kb/ht3964Thanks for the reply. I clean the system about 2x a year, I have yet to change the thermal paste. I could be mistaken, but the noise seems to be coming form the the GPU. I am trying to see if others have had similar problems with the 4870.
I'm not exactly sure when the problem started but I've noticed it more in the past 12 months. I always attributed it to just the load from multi-tasking in multiple programs, but it is noisy even with just a browser open.
I used to run a 4870, and as others have said, it is very loud under load. That said, when not stressed, it was no louder than any other fan.UPDATE
... Could the card be defective? Is this an issue others have had with the 4870? The card performs well- just the fan noise is becoming unbearable.
In my Hex Mac Pro, the idle RPM is 600 for most of the fan, and the booster fan is around 900RPM.Hello,
I have a 12 core Mac Pro with fans also running fast. Does anyone know if there is a reference for how fast fans are supposes to be running at idle (start up, no apps running) for 12 2.93ghz, 5.1 mac pro?
hex = 6-coremikeboss,
is your machine a 6 core or a 12 core, and, how can I find what the specified lower limits are for each fan on my machine?
https://web.archive.org/web/20131026053641/http://pindelski.org/Photography/2013/07/08/mac-pro-2009-part-tbd/I just upgraded my Mac Pro 2009, from the original 8x2.26 to 12x3.33, while I was "in there" I upgraded the Airport to AC and BT 4.0, 5870 to 7950. The only problem I have is Booster 1 (Fan I assume) is 0rpm, the fans are revving pretty high and this is at 0. I'm currently using Macs Control Fan to bring the noise down and have set 2 fans (intake and exhaust) to Ambient.
Is Booster1 the CPU A heatsink fan? Anyone I can tell if its likely to be damaged?