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Use laptop Macs in lid closed mode for quieter operation
Authored by: pslatt on Sep 26, '07 12:05:57PM

This is strange. I followed the links and the tip works, but the fans are going crazy. It is definitely quieter with the lid open ebfore or after turning off the laptop screen. Using iStat I saw that the fans went up to 5000+ rpm with the lid closed and within 30 secs of opening it again they came down to 3000rpm. GPU Heatsink was 50C+ and dropped to 48C. I am using the the Griffen elevator (http://www.griffintechnology.com/products/elevator).

Is it just me seeing this? I definitely question the "for quieter operation" part of this tip.



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Use laptop Macs in lid closed mode for quieter operation
Authored by: hamarkus on Sep 26, '07 02:44:46PM

Simple, if the heat production by the laptop (ie, mainly the processor load) is low enough and/or the heat transfer away from the laptop is high enough (eg, low room temperature) for the computer to stay cool enough with the fans at their lowest speed even with the lid closed than this tip works.



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Use laptop Macs in lid closed mode for quieter operation
Authored by: t-hak on Sep 26, '07 09:02:49PM

I've been using an external monitor with a TiBook and more recently a MBP. I don't always want to use the extended desktop, but I notice that the computer runs hotter with the lid closed, causing the fans to start.

My solution is to plug the keyboard, external monitor and power cable into the laptop with the lid closed and the computer in sleep mode.

After the computer comes to life on the external monitor (usu right after I plug the USB cable of the keyboard in), I then open the lid. The laptop screen stays dark, and the spaces between the keys on the laptop keyboard allows more air to flow through the machine. This keeps the fans from running.

I have also elevated the laptop off of my desk by placing it on top of an Allsop printer stand, which keeps the heat of the computer from drying out the wood on my desk's surface. The printer stand lifts the computer high enough so that the bottom of both screens are almost aligned, which makes for a really nice extended monitor setup when I want to use it.



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