Need help on Mac Pro 5.1 shutting down randomly

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eparq Author

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4 points

Need help on Mac Pro 5.1 shutting down randomly

hi Guys,

i need help with my Mac Pro as I already did a lot of research on net and nothing helped...

i have a Mac Pro 5.1

12 core 2.93

32gb of ram

Gtx 970 (now running a gtx 120 for testing purposes)

2 ssd for OS (mac and windows)

i most usually for 3dmax and autocad on windows bootcamp

it starts 4 months ago with randomly shutdowns, and become more frequently.

On windows, gave me BSOD with WHEA error code. First I reinstalled windows and hold for 3 weeks without shutdown. After started again, I swapped the gpu and tried MAC OS, but it shutted down too randomly. So I run hardwares test and everything was fine.

the shutdown become more frequently at the point that it stay on sometimes only for 10 min and restart....

I already swapped all memories, cleaned everything inside, reset SMC, check Northbridge plastic rivet, applied new thermal paste on all 3 cpu And install a fan control to check the temperatures and control fan speed. It seems to hold it for some more time but after a while it starts again... the temperatures seems to be ok as I saw in a lot of posts, but what get my attention, was that the heatsink B and memories (1-4) were extremely hot to touch but the sensor on fan control not shows nothing extreme....

I brought it to Apple authorized (as on my city don’t have apple store) and they said it was the logic board (easiest answer) without doing any test, just because the higher temperature to touch and justifying that they don’t have any part of this mac to swap for test purposes...

so my last call, was running ASD, and it gave me only one error (attached).

can you guys help me on this? Is the psu or cpu board the problem?

Windows, Windows 6

Posted on Dec 28, 2019 6:06 AM

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Answer 1

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BDAqua

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Dec 30, 2019 3:44 PM in response to eparq

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Answer 2

Dec 31, 2019 8:23 AM in response to eparq

The kernel panic you linked is extremely likely to be a Machine check due to RAM Memory Errors. Detected by multiple processors, status 0004 or 0005, with dumps of register contents. Unfortunately, these do not generally show which DIMM failed. More information is this article:

User Tip: Mac Pro and Error Correcting Co… - Apple Community

.

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Answer 3

eparq Author

Level 1

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Dec 30, 2019 12:50 PM in response to BDAqua

Thanks for replying...

I am using MacfanControl. Today I turned on the manchine and it restarted after 3 minutes. On second attempt, it is on for more the 30 minutes... I am attaching to pictures. First is when it logged in, and second, 20 minutes later...

You said this is probably the logic board, but the Ip0C sensor is about power supply, isn’t it?

that is the log from last crash:

https://drive.google.com/file/d/11xwVLmxD26ApDut4aJYViphPvZAIQYWu/view?usp=drivesdk

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Answer 4

eparq Author

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4 points

Dec 30, 2019 12:55 PM in response to Grant Bennet-Alder

Thanks for replying. That board dont have any wite connected to heatsink. It is a pin bellow heatsink that when you installed it , it connected by itself... Iam attaching a picture of my logic board without the headinks.... I reaplied Grant Bennet too with more info about my machine...

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Answer 5

eparq Author

Level 1

4 points

Dec 30, 2019 1:10 PM in response to BDAqua

Thanks for replying...

I am using MacfanControl. Today I turned on the manchine and it restarted after 3 minutes. On second attempt, it is on for more the 30 minutes... I am attaching to pictures. First is when it logged in, and second, 20 minutes later...

You said this is probably the logic board, but the Ip0C sensor is about power supply, isn’t it?

that is the log from last crash:

https://drive.google.com/file/d/11xwVLmxD26ApDut4aJYViphPvZAIQYWu/view?usp=drivesdk

update: it stay on for 50 minutes on idled, almost no use, just running macfancontrol and small web surfing. The I started to clean my HD deleting files and crashed.

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Answer 6

eparq Author

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Dec 30, 2019 10:13 PM in response to BDAqua

Today it hold more time. It shutted down 4 times on interval of +/- 5min, 40 min, 10min and 80min... than I gave up.

My main concern is to expend on new part and didn’t work, since either PSU or logic board are expensives... because that, I am trying to figure it out first before buy anything.

the history of this model and Ip0C error point to PSU as it is a well known issue, but the apple authorized (I didn’t trust on what they did) and the stranger temperature difference on macfancontrol and on heatsink B and memories on hand touch, points for logic board....

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Answer 7

eparq Author

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Dec 31, 2019 10:57 AM in response to Grant Bennet-Alder

Thanks, I read that link and will try it when I back to the office. But as I remember, I never saw it show less than 32gb of ram as I have some empty slot as suggested on article...

Do you think it could be memory as it keep hight temperature on module B and not the PSU or logic board? On ASD test, the only failed test was Ip0C....

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Answer 8

eparq Author

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Dec 30, 2019 9:37 PM in response to BDAqua

Was that what you need?

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Answer 9

BDAqua

Level 10

250,259 points

Dec 30, 2019 9:50 PM in response to eparq

Ok, that looks better, is it still shutting down randomly Daniel?

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Answer 10

BDAqua

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Dec 31, 2019 9:06 AM in response to Grant Bennet-Alder

Thanks Grant! :)

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Answer 11

eparq Author

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Dec 31, 2019 10:46 AM in response to BDAqua

I am running with panel side off for more than 6 months... 😬

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Answer 12

BDAqua

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Dec 28, 2019 8:19 AM in response to eparq

Sure seems like the Logic Board, but...

What temperatures does this App report?

Never ever ever drop fan speeds below the speed that the Mac itself is calling for.

MacFansControl…

https://www.crystalidea.com/macs-fan-control

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Answer 13

Dec 28, 2019 8:46 AM in response to eparq

<<what get my attention, was that the heatsink B and memories (1-4) were extremely hot to touch>>

I think there is a wire that connects into the heatsink. It connects to a thermistor that reads the actual temperature of the heatsink.

If that had a loose connection, it could produce a reading out of range and allow that heatsink to overheat. It is also possible (but not likely) that the thermistor has failed.

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Answer 14

Dec 31, 2019 11:06 AM in response to eparq

Your kernel panic, machine check, with multiple processors reporting the problem, is almost certainly is a RAM memory problem.

It sometimes occurs in CPU power management because that is where the those errors are tabulated -- CPU Power management is just the messenger, not the problem.

You only see less than the full amount of RAM present when a module incurs a problem during the Power-On Self Test, and is set aside and not used by MacOS.

All other times the module will be used, but if it develops a correctible error while running, it is Bad. A second error in the same word will halt your Mac to keep from poisoning your data.

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Answer 15

BDAqua

Level 10

250,259 points

Dec 31, 2019 7:03 AM in response to eparq

I understand your concern, just wondering, have you tried running it with the side panel off for temp checks?

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Need help on Mac Pro 5.1 shutting down randomly

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