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The PowerMac G5 is a desktop computer first produced in 2003 by the Apple Corporation. This guide will review the repair process of an Apple PowerMac G5 model number A1047 EMC 2061 from 2004. It was discontinued in 2006 as part of the Intel switch first to developers then consumers.

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Requests - Step by step to remove "Memory Heat sink"

Hi all,

My wish is a "Step By Step"- guide for changing the memory "Heat Sink".

My fanspeed is going up and down, pending between 300 rpm - to 2000 rpm.

The computer has been running with both AHT and calibrated with ASD.

After lots of reading about "Fan noise Problems" and test and calibration I have found out that the memory heat sink is the problem. It is placed on backside of the motherboard, on a own board, and its not possible to see it with optisk viewe.

To change it, the motherboard must bee removed.

MY QUESTION IS:

- Do I have to remove the liquid cooling system, to remove the motherboard, or not?

- What parts, and what screws has to removed for getting the motherboard loose?

Please advice with experience.

NOTE:

After lots of reading I have find out that Fan-noise is a common problem on G5 power mac, especcially on G5 2 - 2,5 GHz (2004). On one of my G5/2,5GHz(2004) (have 3 G5 = 1.8 (2004) + 2.3(late 2005) + 2.5(2004) the fan go up and down, and the Memory Heatsink gives unrealistic high temp,(65° Celsius ) from the second G5 start.

I think its a accurancy-related-problem, on the memory heat sink.

Is it possible to by a Memory Heat Sink as parts?

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i've tried to find anything about the memory heatsink - but i found nothing about it

since you are still searching for a solution i think the calibration with asd led to nothing

but i think you should contact me: markus.weiher@gmail.com

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Dubble thanks, great stuff to bee read about the G5 computers.

Markus is the "todays hero", i will say. I will know lots more about the arkitecture of a g5 computers now, only because of having the advantage of reading your answere and getting the mail, many thanks from me. :-)

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hi göran,

i'm glad you could use the info ;-)

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The memory heatsink is on the reverse of the logicboard. If you pull out the logicboard, then flip it over, you will notice a very long heatsink. It will be connected to the logicboard via plastic clips and/or a few screws and bolts. When these are taken off, then you can replace the thermal compound as i did in mine. it should drop the temperature by 10 degrees celcius (in mine it did).

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