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Temperatures & Fan Speeds for Late 2009 iMacs (Please Post Yours)

spcdust

spcdust

macrumors 65816
Original poster
May 6, 2008
1,104
196
London, UK
Could anyone who has a late 2009 iMac post there stats in this thread, purely for comparison and just so we can get an idea of what the average norm is. I'm using Celsius for temps (would be good if we can stick to the same to aid consistency and ease of reference).

All stats are taken when the computer is not under any load - it's been on for an extended time but generally pretty dormant, apart from a little web browsing.

Also, please make sure you state your iMac model.

To monitor temps just download iStat, I'm personally using the iStat Pro version of the software.

Just copy and paste the format below and fill in your own stats.

Computer = 27" Quad Core i7 iMac, 2TB HDD, 8GB RAM

Temps (Celsius)

HD - 43
CPU - 32
Ambient - 16
GPU Diode - 46
GPU Heatsink - 45
Mem Controller - 38
Optical Drive - 33
Power Supply 2 - 44

Fans (RPM)

Optical Drive - 997
Hard Drive - 1099
CPU Fan - 938
 
Mines a few degrees over yours, also does your mac get hot under bootcamp windows xp? with 30% cpu being used doing nothing?
 
My istats were identical to the original poster's, and the machine was identically specced, except that the Hard Drive fan's RPM was drastically higher.

It started around 1300, and over the course of an hour, roared up to 6500+ RPM and stayed there, creating an incredible noise to rival an Xbox 360's! As waiting around for another I7 would take too long, I returned the machine (locally), and brought back an I5 which is completely silent.

EDIT: This "full on fan" didn't seem to be a problem, aside from the noise, as programs and installations (and a three-day 7-pass erase) seemed unaffected.

I believe a sensor problem was the culprit, but I had light bleed issues too.

Cheers,

Gg
 
Temperature
Ambient - 14
CPU - 33
GPU Diode - 42
GPU Heatsink - 41
Memory Controller - 33
Optical Drive - 26
Power Supply - 40
Hard Drive - 28

Fans
CPU Fan - 940rpm
Hard Drive Fan - 1099rpm
Optical Drive Fan - 998rpm

Load Average
0.11, 0.21, 0.15


To be honest, this is cold. My study is normally up at around 20-22 Ambient, with the CPU then in the high 40s to low 50s, with the GPU sitting at the 60-65 mark. Power Supply is the hottest, at around 70.


EDIT: i7, 8GB RAM, 2TB HDD. Flickering/blackout screen issue
 
Computer = 27" Quad Core i7 iMac, 1TB HDD, 4GB RAM

Temps (Celsius)

HD - 37
CPU - 34
Ambient - 18
GPU Diode - 48
GPU Heatsink - 46
Mem Controller - 39
Optical Drive - 33
Power Supply 2 - 49

Fans (RPM)

Optical Drive - 998
Hard Drive - 1099
CPU Fan - 939

This is after idling awhile and coming back to do some simple web browsing.
 
27" iMac C2D 3.06

HD: 34
CPU: 31
Ambient: 16
GPU Diode: 38
GPU Heatsink: 36
Mem Controller: 43
Northbridge: 58
Optical Drive: 34

Fans:
Optical Drive: 998 rpm
Hard Drive: 1099 rpm
CPU Fan: 940 rpm

Pretty much idle:
0.20, 0.38, 0.32
 
21.5" core 2 duo iMac, 2TB HDD, 4GB RAM

Computer = 21.5" core 2 duo iMac, 2TB HDD, 4GB RAM

Temps (Celsius)

HD - 46
CPU - 37
Ambient - 19
GPU Diode - 50
GPU Heatsink - 48
Mem Controller - 46
Optical Drive - 39
Power Supply 2 - 44

Fans (RPM)

Optical Drive - 999
Hard Drive - 1099
CPU Fan - 1198
__________________
 
I'm too lazy to type it out :)
 

Attachments

  • Screen shot 2009-12-20 at 10.05.07 AM.jpg
    Screen shot 2009-12-20 at 10.05.07 AM.jpg
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Computer = 21.5" Core 2 duo 3.06 iMac, 500 GB HDD, 4GB RAM

Temps (Celsius)


CPU - 38
Ambient - 19
Mem Controller - 45
Northbridge -55
Optical Drive - 44
Power Supply 2 - 48
HDD- 51

Fans (RPM)

Optical Drive - 998
Hard Drive - 1099
CPU Fan - 1198
:D :apple: :D

________________
 
Computer = 27" Quad Core i7 iMac, 2TB HDD, 8GB RAM

This is what I typically see when the machine is not in use: (Left) This typical under full load: (Right)
4202546962_ab3f808cd3_o.png
4202567376_1542f04967_o.png



I generally see fairly high HDD temps, my iMac has a 2TB Hitachi. Is anyone else getting high temps with their Hitachi drive?
 
pretty much seeing the same as everybody else is here. my GPU seems to idle a bit higher, sometimes around 60°C. not sure why but its well within limits. :)

will post a picture when i can get one!
 
dave92029 said:
Computer = 21.5" Core 2 duo 3.06 iMac, 500 GB HDD, 4GB RAM
Northbridge -55
Click to expand...

Is that idle? What's this temperature like under a heavy load (ie encoding video)?

Transeau said:
I'm sure you will get over it.
Click to expand...

Yet you're not lazy enough to come back and post a sly response instead of changing your image to reflect Celsius? You have seriously added nothing to this thread.
 
Kirbdog said:
Computer = 27" Quad Core i7 iMac, 2TB HDD, 8GB RAM

This is what I typically see when the machine is not in use: (Left) This typical under full load: (Right)
4202546962_ab3f808cd3_o.png
4202567376_1542f04967_o.png



I generally see fairly high HDD temps, my iMac has a 2TB Hitachi. Is anyone else getting high temps with their Hitachi drive?
Click to expand...

wow your HD only goes up to 50 c? :( mine's usually around 50c when just browsing the internet for an hour or so, but when I watch hulu or any kind of video it skyrockets to 60 c.. should I be concerned / worried? im scared of HD errors later on down the road.
 
27" iMac C2D 3.06

HD: 49
CPU: 34
Ambient: 15
GPU Diode: 45
GPU Heatsink: 44
Mem Controller: 46
Northbridge: 56
Optical Drive: 44

Fans:
Optical Drive: 999 rpm
Hard Drive: 1106 rpm
CPU Fan: 999 rpm

Only thing running was the Logmein session I needed to grab my istats.
 
Why are you guys posting idle temps? They mean nothing, run 20 passes of LINX or IBT and then post your max temps.
 
scroto said:
Why are you guys posting idle temps? They mean nothing, run 20 passes of LINX or IBT and then post your max temps.
Click to expand...

I didn't realize this until you posted it! True story. Idle temps are also important--they show if a probe is too hot, even at idle.

iMatthew said:
27" iMac C2D 3.06
Northbridge: 56

Only thing running was the Logmein session I needed to grab my istats.
Click to expand...

I'm also interested to know your Northbridge temperature under load.
 
whoisrhp said:
wow your HD only goes up to 50 c? :( mine's usually around 50c when just browsing the internet for an hour or so, but when I watch hulu or any kind of video it skyrockets to 60 c.. should I be concerned / worried? im scared of HD errors later on down the road.
Click to expand...

Whilst it is a tiny bit hot, you really shouldn't be concerned about it....
 
scroto said:
Why are you guys posting idle temps? They mean nothing, run 20 passes of LINX or IBT and then post your max temps.
Click to expand...

The idle temps are just as relevant as the temps when the iMac is under load, this thread is purely for users to get a sense of what the average is under these particular conditions. By all means start another thread with a standardised set of CPU / GPU intensive tasks and I'll happily post my stats for you.
 
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