PowerPC Mac Liberation Army

The great MDD G4 cooling project :p

Forum Index → PCI Power Macs & PowerBooks

BeigeG3
Posted: Tue Apr 17, 2007 9:00 am
A while ago, the main fan (the one that blows air across the heat sink) in my G4 decided to stop working. In it's place i installed a new fan and a speed controller. So, i ask, anyone with an MDD G4 (the one with the mirrored drive bay doors), what is your CPU temp? Im trying to balance fan noise with temperature, and am looking for a baseline. Im currently reading a CPU temp (actually taken at the CPU junction (space between the 2 CPUs) of 46.5 deg C.
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Bolle
Posted: Tue Apr 17, 2007 9:08 am
what model do you have? what heatsink? (copper/alu?) I´ve got the dual 1.25ghz one/alu heatsink and my temp is at ~58°C with NAP turned off and at 46°-50° with NAP turned on.
BeigeG3
Posted: Tue Apr 17, 2007 10:45 am
Sorry. It's a Dual 1.25GHz, and i think it's got the aluminum heatsink.

BTW, what is 'NAP'?
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BeigeG3
Posted: Tue Apr 17, 2007 7:31 pm
Just wanted to provide an update:

Well, i've really been putting the MDD through it's paces, and the temperature is stable @ 47.0°c, and it's a wee bit quieter than it was, even after apple's quieting mods.
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Orion
Posted: Wed Apr 18, 2007 5:09 am
My dual 1.25 with the aluminum heat sink runs around 56 or so most of the time. Right now it is at 50 degrees, but it has only been on for a half hour or so.
BeigeG3
Posted: Wed Apr 18, 2007 6:45 am
Mine's been on for a bit over 24hrs now, since i started this thread, and it seems to keep around 45.5°c to 47°c, with the fan running near full tilt. If i quiet it down a bit (which i can do via a knob, mounted in a PCI slot cover) it warms up to around 50ish.
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Bolle
Posted: Wed Apr 18, 2007 10:03 am
the so called 'nap-mode' is some kind of power save function of the g4 processor. it´s used in the apple g4 notebooks but the processors in the desktop machines support it, too. you can turn it on/off using the 'hardware' control panel that comes with the apple CHUD tools. this isn´t supported by apple but works ok for me.
BeigeG3
Posted: Wed Apr 18, 2007 12:58 pm
Got a link to said tools? Or can you tell me where i can acquire said tools?
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Bolle
Posted: Wed Apr 18, 2007 1:05 pm
a search on apples downlaod site for 'CHUD tools' should do it.

EDIT: ftp://ftp.apple.com/developer/Tool_Chest/Testing_-_Debugging/Performance_tools/CHUD_4.4.4.dmg
BeigeG3
Posted: Wed Apr 18, 2007 2:52 pm
Thanks!
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