Idle Temp of 28C (82F) !!! ...but are the fans working?

Ok now that I have your attention :P
Seriously though here is my info, as no one has really posted everything about their MBP's when posting their temps.

CPU on Idle
- A cold boot (was off for few hours)
ambient (room) temp, 15C:
MBP feels like its been in the fridge and starts up with 8C cpu temp. It gets up to 15C, then 24C and stays in mid 30's after 5-10% cpu usage.

- Waking up from sleep
ambient temp, 17C:
MPB feels normal, idle temp of 28-38C.

- Has been on for several hours
ambient temp, 17C:
If I'm not running many apps it may idle at 38C/41C.
Other times (like now) 46C. MBP feels warm but not hot.

High CPU Usage
When running 'yes > /dev/null' in Terminal or ripping a CD cpu temp gets to around 75-80C. But will cool quickly once processor is idle again, to around 45-50C.

Medium CPU Usage
Let's say 20-50% cpu, this is rough guide, I get temp of mid 50's and sometimes above 60C.

(Note: I used Temperature Monitor for temps, and had usually an ambient temp of 17C, though it might be a little warmer. I also have the firmware update from factory).

Other info:
Boot ROM Version: MBP11.0055.B03
SMC Version: 1.2f10

And yes I do have a question ^_^;
Is the faint woosh on the left of the keyboard the HD fan or the CPU fan?? Many people are saying with the new firmware their fans run constantly. I initially thought this must be one of the fans.



MacBook Pro 15" 2GHz, 512MB, Week 28 Mac OS X (10.4.7) AMD Desktop 2.1GHz, 512MB, WinXP (SP1)

Posted on Jul 31, 2006 7:51 PM

Reply
4 replies

Jul 31, 2006 10:08 PM in response to Sarkastik

Those are normal temperatures.

The left fan runs at low speed even when the CPU temps are low. The fans will ramp up, with the right fan running at higher CPU temps. Even with the CPUs running flat out the fans are pretty quiet, especially compared to my old TiBook. During the Hardware Test routines you can hear the fans come on for a short time.

If sensors fail or disconnect the fans will run at full speed constantly. Several people who did the "thermal grease fix" broke sensor connections and had that problem. Speaking of which, I'm glad that thermal grease topic seems to have come to a well-deserved end.

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Idle Temp of 28C (82F) !!! ...but are the fans working?

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