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Is this a safe temperature?

quagmire

quagmire

macrumors 604
Original poster
Apr 19, 2004
7,045
2,587
So updating to iOS 4 and iTunes putting my photo's back on my iPhone, I have noticed the highest temperatures I have seen my Early 2008 17" MBP go. It is reaching temperatures up to 212 F or 100 C, but has found an average 207 F or 97 C. This is the highest I have seen my MBP go when the CPU is pegged. It usually hangs out at around 165-170 F when under load( such as Folding@home).

Is this a safe temperature?
 
 
no that is way too high, especially for the 2008 model. my old 2008 model never ever went above 79º celcius
 
Lokrado said:
no that is way too high, especially for the 2008 model. my old 2008 model never ever went above 79º celcius
Click to expand...

There's no danger unless it gets well over 100 C, at which point the processor should shut itself down anyway. I believe Intel chips will do that once the die temp reaches 105 C.

That said, keeping your computer free from dust and a good fan control app (I used to use smcFanControl, but now use the IMHO superior Fan Control) will help keep the temps down, which is a good idea regardless.
 
mac2x said:
There's no danger unless it gets well over 100 C, at which point the processor should shut itself down anyway. I believe Intel chips will do that once the die temp reaches 105 C.

That said, keeping your computer free from dust and a good fan control app (I used to use smcFanControl, but now use the IMHO superior Fan Control) will help keep the temps down, which is a good idea regardless.
Click to expand...

Yep, I have smcfancontrol installed and have it set to increase the fan speeds once it hits 140 F. And my desk is relatively clean of dust( gets cleaned weekly) so I don't think my fans are clogged with it.

Temps have gone back down after it finished optimizing all 2570 photo's, but it was peaking at 216 F or 102 C.
 
Fans won't necessarily spin faster just because you attain a high peak temp. Usually, that temp must be maintained for a period of time before the fans spin up.
 
GGJstudios said:
Fans won't necessarily spin faster just because you attain a high peak temp. Usually, that temp must be maintained for a period of time before the fans spin up.
Click to expand...

The fan control app (which is actually a preference pane) allows you to have the fans slowly speed up according to a user-defined curve. Which means the fans speed up when they need to and then slow back down as the temp falls.
 
mac2x said:
The fan control app (which is actually a preference pane) allows you to have the fans slowly speed up according to a user-defined curve. Which means the fans speed up when they need to and then slow back down as the temp falls.
Click to expand...

I'm referring to native Mac OS X, not 3rd party apps.
 
Sorry for the bump,

Sort of relevant( I think). I plug in my Nikon D60 and using Nikon Transfer start transferring all my photo's onto my MBP. I go on to do something else and 5 minutes later I come back to my computer having shut itself down. I go into Console and get, " Previous Shutdown Cause:5" Does anyone know what that means? Does it mean an overheat?
 
Lokrado said:
no that is way too high, especially for the 2008 model. my old 2008 model never ever went above 79º celcius
Click to expand...

I don't think so. T8300 (2.4 GHz) and T9300 (2.5 GHz) in these models both have Tj,max of 105 C. Therefore under full load the cooling system will max out at about 105 C for a couple of minutes and then settle to about 95 C.

Older models (eg with CoreDuos) had Tj,max of 95 C and tended to max at 95 C and settle at 85 C or 90 C.

So OP's computer is fine. Maybe you never really stress tested yours.
 
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