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Did Snow Leopard change SMC settings?

C

cababah

macrumors 68000
Original poster
Jun 11, 2009
1,891
504
SF Bay Area, CA
I did not have to use smc fan control earlier but ever since 10.6, it seems my notebook does not ramp up the fans until 90C or even higher. In 10.5 I would see the fans to start coming on when the temp got in the 80C range.

Anyone else have a similar experience? I was converting a movie to my iPhone using Quicktime X last night and I saw the temp get to 100C before the fans ramped up and stayed at about 6200rpm. I hate to make another cpu temperature thread, but I am trying to see if Snow Leopard had any impact on SMC settings.

(I also did a SMC reset after installing SL and the effects are the same with the fan speed not coming on sooner) I guess now is the time to get the program to control my fan speed. Just sucks that Apple themselves cannot control their own temps and we have to get 3rd party help :mad:
 
cababah said:
I did not have to use smc fan control earlier but ever since 10.6, it seems my notebook does not ramp up the fans until 90C or even higher. In 10.5 I would see the fans to start coming on when the temp got in the 80C range.

Anyone else have a similar experience? I was converting a movie to my iPhone using Quicktime X last night and I saw the temp get to 100C before the fans ramped up and stayed at about 6200rpm. I hate to make another cpu temperature thread, but I am trying to see if Snow Leopard had any impact on SMC settings.

(I also did a SMC reset after installing SL and the effects are the same with the fan speed not coming on sooner) I guess now is the time to get the program to control my fan speed. Just sucks that Apple themselves cannot control their own temps and we have to get 3rd party help :mad:
Click to expand...

Know the feeling. For fan speed control, install smcFanControl v2.2.2, which is Snow Leopard-compatible and works great:

http://www.eidac.de/

My mid-2007 C2D MBP normally idles at about 55 deg C in Snow Leopard and when apps gets a little busy, hits about 80 degrees. When it's really busy with something processor-intensive, hits about 100. That's about as high as I've seen it go and doesn't normally hit 100 because of the way I use the MBP.
 
dr. shdw said:
Did you answer your own thread? o_O
Click to expand...
Yes I did. I was bored and figured it might get me a response.
dr. shdw said:
100C? Maybe something is wrong with the sensor but that's way too hot..
Click to expand...
I don't know but it has been doing this only after 10.6 which lead me to think it had something to do with the OS.

electroshock said:
Know the feeling. For fan speed control, install smcFanControl v2.2.2, which is Snow Leopard-compatible and works great:

http://www.eidac.de/

My mid-2007 C2D MBP normally idles at about 55 deg C in Snow Leopard and when apps gets a little busy, hits about 80 degrees. When it's really busy with something processor-intensive, hits about 100. That's about as high as I've seen it go and doesn't normally hit 100 because of the way I use the MBP.
Click to expand...

*sigh* Yeah I guess I will install that program.
 

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cababah said:
Yes I did. I was bored and figured it might get me a response.

I don't know but it has been doing this only after 10.6 which lead me to think it had something to do with the OS.

*sigh* Yeah I guess I will install that program.
Click to expand...

Something isn't right, you should have 2 exhaust fans in the MBP. Maybe you should take it in.
 
Download Fan Control 1.2 and adjust the lower and upper threshold to suit what speed the fan should spin at what temperatures.
 
This is almost identical to what I am seeing on my new 13" MBP. I just called Apple support and they tell me it is normal and that it is within the operating range.

Let's just hope that they quietly release an SMC update to counter this problem!
 
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