MPB temperature questions...

just 2 quick questions. Ive searched the forums a bit, and while Ive found hints, i cant quite answer my own question.

First, my macbook pro 2.6ghz (Merom proc) can run as hot as 165-170 degrees Fahrenheit while surfing the web/streaming videos. This seems a bit hot to me... I realize these computers tend to run pretty warm, and as i slow down net usage and the computer idles more, the temp drops as low as 120 F, but usually hovers (with casual use) between 140-150 F. I've heard of some macbook pros running much MUCH cooler, as low as 100 F. These might be older models though, with considerably slower processors.

Second, how does apple handle heat-related issues? Ive heard of people replacing the thermal paste (I'm VERY reluctant to do this myself)... is this the sort of thing apple maintenance would do? Or will they just send me on my way and tell me its normal.

I don't use my laptop ON my lap ever, but i worry about the machine overheating, and the kind of damage this can do to the processor or the internal circuitry... at what temp should i REALLY begin to worry that my processor is pushing it too far...

Thanks
Chris

Dual 1.8 GHz Powermac G5, Macbook Pro 2.6ghz Intel Core 2 Duo, 15", 4GB RAM, Mac OS X (10.5.2)

Posted on May 10, 2008 7:44 PM

Reply
5 replies

May 10, 2008 9:14 PM in response to Chris Bedrosian

The 2.6ghz Penryn should actually run cooler than the older processors. So at the same load, yours should be cooler.

My 2.2ghz MBP stays in the 50's (celsius) under normal use. Right now I am at 120F/48C running Safari,iTunes, and Azureus. When I am gaming, it hovers in the 80's C. I believe the critical temp is around 100C.

I am also using SMC fan control with my fans at 3000rpm (up from the default 2000rpm), so your temps are normal compared to mine.

May 10, 2008 9:40 PM in response to Chris Bedrosian

Chris,

The Merom's "thermal limit" is 110 C. That's very, very hot. Normally, the upper limit for the CPU in a Macbook Pro should be around 80 - 85 C. You shouldn't ever see temps above this range, even when you push your Macbook Pro to its limits. However, 80 -85 C, even for extended periods of time, is completely normal, and your Macbook Pro is designed to suffer no ill effects from these temps.

Scott

May 11, 2008 1:44 AM in response to Chris Bedrosian

Chris Bedrosian wrote:
I've heard of some macbook pros running much MUCH cooler, as low as 100 F. These might be older models though, with considerably slower processors...
Ive heard of people replacing the thermal paste (I'm VERY reluctant to do this myself)...


Actually, the older MacBook Pros ran hotter - which was when people got really exercised about replacing thermal paste and the like. My first MacBook Pro, which was the first generation ran substantially hotter than my current beast. The first generation was Core Duo rather than Core 2 Duo - hence the temperature problems. When they made the transition to Core 2 Duo the angst about temperatures kind of died down.

As for MacBook Pros running at 100F - I'd be amazed. Desktop processors might, but that is not the way these things are designed to work. Maybe that reading is an external case reading rather than a core reading. But marginally above room temperature would be remarkable for a laptop processor. With the first generation people were happy to get their core temperatures down to 60C ~ 140F. I'd consider that bog standard for my current MBP - a 2.4GHz Santa Rosa (forget what name people give to the processor because I don't care about Meroms, Penryns, Flagelates, Bornswindles or Fliggelhoofers - just that it works.) When you tax the processor it should jump to about 80C ~ 175F. Some websites can do that because they need all those ads to run smooth animation endlessly.

You should worry if you burn yourself or the computer doesn't function properly - otherwise trust that Apple hires thermal engineers that are competent at their jobs and forget about it.

May 11, 2008 8:49 AM in response to JASimon

You know I had this question after I bought my first MBP, it seemed to operate a lot hotter then my old gateway and dell laptops. I took the machine back to the apple store and asked them what the normal operating temps were and they said I wasn't even close to being in danger. I was around 85 degrees F.

Right now my machine hovers between 60-65 when running normal operations. When I start to go between 5-10 different programs sometimes it will heat up to about 90 Degrees but always cools down rather fast.

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MPB temperature questions...

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