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Ugh !!! MacPro Freezing
Posted by: Spock
Date: May 11, 2022 05:33PM
My 4.1(firmware upgraded to 5.1) twin 4 core MacPro with 42 Gb RAM had frozen. Hard started, logged in and it ran for a couple of minutes then froze again. Tried again, this time logged into my vanilla Troubleshoot account, same result. Unplugged all USB devices other than keyboard and mouse and booted in safe mode, same again, froze after just over two minutes. Reset PRAM, no change.This was in OSX 10.12 Sierra on a PCI mounted SSD. I have multiple other OS’s on multiple HDD’s, tried them all including my old favorite 10.6 Snow Leopard, all froze. It won’t run long enough to run Disk Utility or Rember.

So I’m thinking this might be a hardware rather than software problem and I should start pulling the RAM and either replace it with some old 1 or 4 GB chips or ….. unless someone has a better idea?



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Re: Ugh !!! MacPro Freezing
Posted by: Speedy
Date: May 11, 2022 05:37PM
Replace the thermal paste on the processor…



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Re: Ugh !!! MacPro Freezing
Posted by: Racer X
Date: May 11, 2022 05:56PM
what he said. use the good stuff, like arctic silver.

When you are in there with the thermal paste at hand, do your video card heat sink as well. My old paste really DID look like dried and cracked toothpaste. Video card suddenly worked again.



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Edited 1 time(s). Last edit at 05/11/2022 05:57PM by Racer X.
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Re: Ugh !!! MacPro Freezing
Posted by: ka jowct
Date: May 11, 2022 06:04PM
Quote
Speedy
Replace the thermal paste on the processor…

One of my MDDs started doing that, locking up hard after 15-20 minutes of use. In the process of futzing with various solutions, I discovered that the thermal paste looked like Death Valley. Ran fine with fresh Arctic Silver.



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Re: Ugh !!! MacPro Freezing
Posted by: Spock
Date: May 11, 2022 07:13PM
OK, thanks guys. Even though I think I have some old Arctic Silver left over from a Hackintosh build I'll order some fresh and have at it.



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Re: Ugh !!! MacPro Freezing
Posted by: Racer X
Date: May 11, 2022 07:20PM
it is a loooong t15 for the heat sinks I believe.



********************************************
“A sword never kills anybody; it is a tool in the killer's hand.” Seneca the Younger

The police have no duty to respond. See Castle Rock v. Gonzales, 545 U.S. 748 (2005) or Warren v. District of Columbia[1] (444 A.2d. 1, D.C. Ct. of Ap. 1981)

Judge Lee wrote that “we cannot jettison our constitutional rights, even if the goal behind a law is laudable." 9th Circuit Court of Appeals

[www.youtube.com]
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Re: Ugh !!! MacPro Freezing
Posted by: Spiff
Date: May 11, 2022 08:38PM
Yup. Had to buy specific tools to replace my cpus on my 4,1.
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Re: Ugh !!! MacPro Freezing
Posted by: Spock
Date: May 12, 2022 07:26AM
Quote
Racer X
it is a loooong t15 for the heat sinks I believe.

Thanks for the heads up. Fortunately I have a torx set with 6" shafts.



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Re: Ugh !!! MacPro Freezing
Posted by: AllGold
Date: May 12, 2022 02:28PM
If you can get it to run long enough to install a temperature monitoring utility do that. But I think you should probably start with your first troubleshooting idea and start pulling and swapping RAM.



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