Fans, fans, fans

MTGrizzly

macrumors newbie
Original poster
Jan 29, 2012
2
0
On my Early 2011 MacBook Pro (13.3" i5), fan speeds sped up to 6100RPM and stayed there.

The temps where within normal limits. With fans running this fast, a full charge on the battery lasted about 2 hours.

I sent it to Apple. They replaced the logic board and the heat sink.

Now, the fan speeds only go up to approx. 4100 RPM and stay there.

The CPU temp is around 76-77C

All 3 Base temps are running at 31C

The heat sink is 53C

The memory module is around 50C

The fan running does not change any of the temps.

Needless to say, this reduces the life of a battery charge, significantly. Maybe I get three hours out of a charge...

Anyone got any ideas?????

At least it is slightly less noisy at 4100 than at 6100

 

TheIguana

macrumors 6502a
Sep 26, 2004
656
389
Canada
Your fans running fast are indicating your Mac is probably running an intensive CPU process and producing lots of heat as a result. Open up the "Activity Monitor" organize the list by CPU % and tell us what processes have the highest number.

The fans themselves use very little power contrast to the other components of your Mac thus the "high" speed they are running at are likely not the rot cause of your shorter battery life.
 

iforbes

macrumors 6502
Dec 21, 2011
327
1
Your fans running fast are indicating your Mac is probably running an intensive CPU process and producing lots of heat as a result. Open up the "Activity Monitor" organize the list by CPU % and tell us what processes have the highest number.

The fans themselves use very little power contrast to the other components of your Mac thus the "high" speed they are running at are likely not the rot cause of your shorter battery life.
Don't forget to change "My Processes" to "All Processes" to get a complete picture in Activity Monitor.
 

thundersteele

macrumors 68030
Oct 19, 2011
2,984
7
Switzerland
Needless to say, this reduces the life of a battery charge, significantly. Maybe I get three hours out of a charge...

Anyone got any ideas?????
I would just bring it back to Apple. If they can't fix it three times you should be in for a replacement machine (i.e. a new one!).
 

hakuryuu

macrumors 6502
Sep 30, 2007
346
1
Lomita, CA
Are these temps at idle or under load (flash video for example)? Also, what is your room temperature?

I have never seen a Mac idle that high without the room being exceedingly warm or airflow blocked or something similar.
 

GGJstudios

macrumors Westmere
May 16, 2008
44,425
780
The fact that the OP had the logic board and heat sink replaced suggests there may be something faulty with the replacement job. I'd send it back to Apple.
 
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