Alu macbook runs warmer than whitebook [test]

[maximus06]

This isn't a complaint, merely an observation. I own two macbooks at the moment, a 2007 white macbook (2 ghz, rev 3.1) and a new aluminum macbook (2.4ghz, rev 5.1).

Anyways, I put them side by side and ran some "tests", I compared the screens, the speaker quality and the temperatures using iStat Pro.

CPU:
The result was a bit surprising to me: the white (older) macbook ran at an average CPU temperature of ~86 degrees while the new alu one ran at ~96 degrees fahrenheit.

Fans:
Old macbook avg RPM: ~1800
New macbook avg RPM: ~2000

So in conclusion, the new macbooks ARE hotter even though their fans run at higher speeds. Can anyone explain this? Wouldn't this impact battery life?

I might mention that all this was basically while browsing the web, playing music in iTunes or idling.

 

[Eidorian]

Aluminium is a greater conductor of heat then plastic?

 

[maximus06]

Aluminium is a greater conductor of heat then plastic?

That would explain why the "enclosure parts" are ~5 degrees hotter than on the white macbook, but not the CPU temperatures/fans.

 

[Eidorian]

That would explain why the "enclosure parts" are ~5 degrees hotter than on the white macbook, but not the CPU temperatures/fans.

On more thing. I've done my own tests and Apple has tweaked the SMC on the new aluminium laptops not to throttle up the fans until they reach much higher temperatures.

 

[Tinknock71]

Maybe the Porn sites are making the computer a little hotter! anyways you would think the alum. one would be running cooler with the latest and greatest technology in it.

 

[erstwhilepo]

The new MacBook has more graphics horsepower.