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MP 6,1 Mac pro 6.1 upgraded to 12 core shows only 6 cores in Activity monitor?

Koka016

Koka016

macrumors regular
Original poster
Aug 30, 2020
101
12
Serbia
HI ALL

Today I finaly did upgrade of my 6 core 3.5ghz Mac pro 6.1 to 12 core 2.7ghz. After upgrade Mac pro boots but shovs cores are on 2.5 GHz in About this mac and most strange thing Activitu monitor shows only first 12 cores second 12 is grayed out.

How did this happened ? Did i broken some pins on my motherboard ? Because 1 torx 10 for holding CPU goes out with his holder.

Can this be bad E5-2697 V2 from China ?

Any suggestions will be welcome ?

I reseted Pram and memory normaly shows 1866 mhz all 4 slots filed with 8 gb dimms.

A will atach images when arrive to home.

As I sea from serial number and Batch number this is not usual E5-2697 V2 CPU ?
 

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Koka016 said:
HI ALL

Today I finaly did upgrade of my 6 core 3.5ghz Mac pro 6.1 to 12 core 2.7ghz. After upgrade Mac pro boots but shovs cores are on 2.5 GHz in About this mac and most strange thing Activitu monitor shows only first 12 cores second 12 is grayed out.

How did this happened ? Did i broken some pins on my motherboard ? Because 1 torx 10 for holding CPU goes out with his holder.

Can this be bad E5-2697 V2 from China ?

Any suggestions will be welcome ?

I reseted Pram and memory normaly shows 1866 mhz all 4 slots filed with 8 gb dimms.

A will atach images when arrive to home.

As I sea from serial number and Batch number this is not usual E5-2697 V2 CPU ?
Click to expand...
I will first check if the serial number on the CPU is the same on the box.
 
OK thanks for replay

If Mac pro boots normally is there any chance that CPU is damaged? I dont have power to reassemble again!

In Hardware monitor by Marsell Bresink says 12 core 24 thread but still 2.5ghz instead of 2.7

Is it posible that Mojave install on Samsung 970 EVO M.2 blade from Mac pro 5.1 did that?

Before CPU upgrade everything shows as expected no problems with Mojave instaled on 5.1 Mac pro
 
Holly crap now the number of CPUs is correct but frekvencu is not still 2.5 ghz.
 

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Geekbench 5 score is good ?
 

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Hi stockholm80

I dont think so.
When I do AHT I got message that everything is OK.
Cant beleave that Apple Hardware Test cant determine damaged pins of CPU board.
 
Here are the pictures of CPU before I installed it in Mac pro 2013/
Hope this is serial number on the bottom?

Just to mention my Mac pro 2013 is made in June 2017 and has original Apple SSD
that read and write 1350 MB/s in Black magic disk speed tests.Strange not all Trashcans are the same.
 

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Koka016 said:
Here are the pictures of CPU before I installed it in Mac pro 2013/
Hope this is serial number on the bottom?

Just to mention my Mac pro 2013 is made in June 2017 and has original Apple SSD
that read and write 1350 MB/s in Black magic disk speed tests.Strange not all Trashcans are the same.
Click to expand...
The serial number is too burry, can't be decoded back into number via that picture.

And yes, I would like to check if that's the same number as the box. Otherwise, it may not be a 2697V2. It isn't that hard to change the IHS.

However, since you have more than one problem, but not just downclock. Therefore, up to this moment, I tends to agree with stockholm80.
 
Is there any software to read serial number of CPU ?
From Hardware monitor I sea this info ?
 

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Here is CPUid info

Someone can point to the real problem?
 

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Any suggestions ? All applications shows only Intel @ 2.5ghz 12 cores 24 threads and everything works good.
No applications that I used, recognise as E5-2697 V2 . Noname CPU from Intel ? Or someones experiment?

I think I will leave that way :cool:
 
Koka016 said:
Any suggestions ? All applications shows only Intel @ 2.5ghz 12 cores 24 threads and everything works good.
No applications that I used, recognise as E5-2697 V2 . Noname CPU from Intel ? Or someones experiment?

I think I will leave that way
Click to expand...
solely based on the frequency of 2,5ghz it seems that you have received a E5-2696 V2 model and NOT E5-2697 V2 like the stamped information on the CPU shows...
 
MikkelAD said:
solely based on the frequency of 2,5ghz it seems that you have received a E5-2696 V2 model and NOT E5-2697 V2 like the stamped information on the CPU shows...
Click to expand...
I think the same. But who stamped and sold mistake info on IHS ?
Who knows as Apple Hardware Diagnostics tell me no errors at all Im not reasembling again.
 
I would send it back if I were you. That's just not right. I'm beginning to lose count of all the threads people have made about a 6,1 CPU upgrade gone wrong. The success rate has got to be awfully low.
 
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Hi I have another theory!
Analizing CPU boost clock of max 2.9 and TDP around 90w with Intel CPU app I think this is the processor

E5-4657LV2

That is why not recognised by any App on Mac i think.

What do you think ?
 

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The corners of the chip don't look like my E5-2690 V2 (please see attached), they are differently cut. Maybe an engineering sample with a swapped IHS (integrated heat shield), like it was suggested allready.
1607436629075.png
 
I don't know any way to read the CPU serial number via software.

Even Intel never says that can be done. You have to scan the bar code on the CPU to check the serial number.
 
the CPU that the OP got is very clearly a re-marked engineering sample

the 3 big giveaways are the base clock speed not matching a genuine example

the CPUID string of just "Genuine intel CPU @"

and the CPUID itself which is Family 6 Model 62 stepping 2

a retail/production Ivy Bridge EP CPU (like a genuine E5-2697 v2), would be Family 6 Model 62 Stepping 4


I would request a refund/return on the CPU
 
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Sea a phisical borders of the CPU ?

I think this is my E5-2697 V2 from ebay.

Geekbench 5 is around 7300 points Protools working like never before so many AAX plugins no spikes at all..

So Im not in rush any more. Just curious why somebody did swap IHS from E5-2697 V2 ?
On 3th picture is my CPU pictured before install!
 

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