Kernel panic on startup after cpu upgrade

Question

Mac Pro 2009-2012

2009년 3월에 소개된 The Mac Pro (Early 2009)는 Intel Nehalem 아키텍처를 Apple의 전문가용 데스크탑 라인에 도입하였으며 미묘하게 재설계된 내부는 2010 및 2012 CPU 업데이트를 통해 소개되었습니다.

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Daniel @pherson

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게시일: 2017년 11월 21일

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Kernel panic on startup after cpu upgrade

So, I was thinking of upgrading my early 2009 Mac Pro 4,1 Nehalem dual Quad-Core 2.26GHz to a Westmere 12-core but before getting my hands on such CPUs I thought I’d try out a couple of x5570 2.93GHz quad-cores (lidded, fitted with washers and 5mm thermal strips, I happened to have laying around.

The machine is firmware upgraded to 5,1.

I had to re-set cpu b about a million times before the computer would boot without any blinking power button or red lights on the backplane.

It boots fine with any of the two single processors on its own (with red light and fan at full throttle) but when both are installed I get kernel panic on startup.

I’ve reset SMC, started up with opt+R+P and nothing helps. It won’t boot in recovery mode either.

I’ve also removed the Northbridge heatsink and cleaned up the dried thermal paste and reapplied with new.

See linked picture of panic screen here: Kernel panic

(I don’t understand aaanything of it)

Any ideas?

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What system are you running and how was the firmware flashed?

mayer 의 2017년 11월 21일

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What system are you running and how was the firmware flashed? — mayer

jared woodward @jwood0027 평판: 1 · Answer 1 · 2018-01-28T03:13:01-07:00

jared woodward @jwood0027

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게시일: 2018년 1월 28일

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Im having the same problems. Mayer any ideas?

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Franz Katafiasz @mackata49 평판: 1 · Answer 2 · 2018-06-25T03:26:40-07:00

Franz Katafiasz @mackata49

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게시일: 2018년 6월 25일

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Did you solve the problem? I've got the same trouble

해당 답변은 도움이 되었습니까?

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daniel11 @daniel11 평판: 1 · Answer 3 · 2018-06-25T03:40:19-07:00

daniel11 @daniel11

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게시일: 2018년 6월 25일

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Hi,

I gave up for a while, then I refitted the cpu’s 20 more times and then the kernel panics stopped. However one of the heatsink fans isn’t working and I can’t figure out why, maybe the board, maybe the heatsink fan itself. Good luck!

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Bart @bart88840 평판: 203 5 29 · Answer 4 · 2018-06-27T14:54:49-07:00

Bart @bart88840

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how thick washers? I used 2 M4 (2.2mm) How tided screws?

Thats for beginning - I need to give MANY more specific informations - if not - no help :(

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freerol @freerol 평판: 13 1 · Answer 5 · 2020-03-01T18:02:32-07:00

hello

i have also questions about problems with the cpus not detected,

the no-booting mac :-(

have to check if the processors are already working

have to check if no pins are bent on the socket under a cpu

i found that..

https://www.imore.com/how-upgrade-your-o...

1) the black connectors of the heatsinkers ,

have to be reseated (a little bit out of their original position).

to be perfectly connected.

2) doing this tricky operation… NEVER OVERTIGHTEN the springscrews when seating back the sinkers.

cross pattern. never press on the top of the sinker.

count the number of rotations before (when removing the sinkers),

note them, and reproduce them with care

3) have to respect the difference of thickness of a delidded cpu and a lidded one. (3mm or 5mm),

this layer…. with 3 or 3 washers?

5mm thickness of thermal strip ? he removed the original pink layer.

Mac Pro 2009-2012

Kernel panic on startup after cpu upgrade

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