One core of four (CPU A Core 2 Diode) Runs Really Hot

Question

Power Mac G5

PowerMac G5는 Apple Corporation에서 2003년에 처음 제조한 데스크톱 컴퓨터입니다. 이 안내서는 2004년 Apple PowerMac G5 모델 번호 A1047 EMC 2061의 수리 과정을 검토합니다. 2006년에 먼저 개발자에게 그 후 소비자에게 Intel 스위치의 일환으로 판매가 중단되었습니다.

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Kirk Holz @xentaur

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게시일: 2012년 4월 30일

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One core of four (CPU A Core 2 Diode) Runs Really Hot

I have a Power Mac G5.

Hardware Overview:

Model Name: Power Mac G5 Quad

Model Identifier: PowerMac11,2

Processor Name: PowerPC G5 (1.1)

Processor Speed: 2.5 GHz

Number Of CPUs: 4

L2 Cache (per CPU): 1 MB

Memory: 12 GB

Bus Speed: 1.25 GHz

Boot ROM Version: 5.2.7f1

Lately the fans run loud so I installed Hardware Monitor and it appears that CPU A Core 2 is running into 90°C while all the other cores are staying below 60°C.

Can this be right? Wouldn't CPU A Core 2 be under the same die as CPU A Core 1?

Can anyone say why this might be happening and how I can fix it? I build computers and I'm not afraid of pulling the LCU out and re-applying thermal interface, but it sounds like the design of the computer might make that difficult.

답변되었습니다! 답변 보기 저도 같은 문제를 겪고 있습니다

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mayer @mayer

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MacHale Enterprises

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게시일: 2012년 5월 1일

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You may have developed a coolant leak. You'll need to do some reading on this, but here's a start:http://www.xlr8yourmac.com/systems/G5_co...

http://www.xlr8yourmac.com/systems/Dual_...

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I have inspected the inside of the case and see no signs of a coolant leak. However, I just noticed that the one core that is overheating, also has a higher voltage and current than the other three by 16-20%, the overheating core has a voltage of 1.29 - 1.35 while the others are 1.18 - 1.21, also, the Current is 23A while the others are 20A. I'm supposing this isn't a coolant problem, however, it doesn't look good for my old workhorse!

I suppose, before I do anything more I should reinstall Mac OS, just to be sure.

Kirk Holz 의 2012년 5월 1일

Make sure you have the original system installation disk with the fan sycning software because any major changes will require it or your fans will run wild.

mayer 의 2012년 5월 1일

I don't have the original disks, which were 10.4, I'd be installing directly with 10.5. Where can I find the fan syncing software? I have the full OS X 10.5 Install disks for all Apple hardware.

Kirk Holz 의 2012년 5월 2일

Call Apple and request the original installation disk with the AHT and fan syncing utility, it will not be on a retail 10.5 disk. They should charge you $16 for it plus shipping and tax.

mayer 의 2012년 5월 3일

댓글 달기

I have inspected the inside of the case and see no signs of a coolant leak. However, I just noticed that the one core that is overheating, also has a higher voltage and current than the other three by 16-20%, the overheating core has a voltage of 1.29 - 1.35 while the others are 1.18 - 1.21, also, the Current is 23A while the others are 20A. I'm supposing this isn't a coolant problem, however, it doesn't look good for my old workhorse!

I suppose, before I do anything more I should reinstall Mac OS, just to be sure. — Kirk Holz
Make sure you have the original system installation disk with the fan sycning software because any major changes will require it or your fans will run wild. — mayer
I don't have the original disks, which were 10.4, I'd be installing directly with 10.5. Where can I find the fan syncing software? I have the full OS X 10.5 Install disks for all Apple hardware. — Kirk Holz
Call Apple and request the original installation disk with the AHT and fan syncing utility, it will not be on a retail 10.5 disk. They should charge you $16 for it plus shipping and tax. — mayer