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Lost one of my Quad cores

  • CPUs
  • Quad
  • Processors
Last response: in CPUs
July 20, 2012 2:13:51 PM

Hi all,
I have recently updated win7 in MS and lost one of my quad cores???
I have tried going into msconfig and checking the number of processors to reset it but it's only showing three.
I then tried uninstalling the processors from Device Manager in case it re-found them all again, No joy!
I suspect it is an issue that Ms update has passed onto my bios but don't have the slightest clue what it maybe could someone please help me. :(  :( 

More about : lost quad cores

July 20, 2012 2:15:40 PM

Hardware configuration :
CPU; AMD Phenom 2 X4 965
RAM; 4x2GB Corsair DDR3 1333
HD; WD CB 750 GB
Cooling; Corsair H60

July 20, 2012 2:17:23 PM

as in you lost 1 of 4 cores in your processor?
if you go to task manager you only see 3 threads?
Related resources
July 20, 2012 2:49:19 PM

Komomu said:
as in you lost 1 of 4 cores in your processor?
if you go to task manager you only see 3 threads?

thats right only three of four working.
a c 257 à CPUs
July 20, 2012 2:59:43 PM

Uncheck the check box in MS config that says to use a certain number of processors, reboot and check again.

Also check in BIOS and confirm that it is reading you as a quad core still, i would also check with CPU-z and see if it thinks you lost one.
July 20, 2012 5:10:34 PM

Hunter 315, thanks for your input on this,
I had tried that but to no effect unfortunately in the end I took an old BIOS Flash and loaded it onto a DVD re-started going in to the BIOS and then flashed it then re-booted shut it down switched it off from the PSU switch unplugged it the power lead and re-booted, Job done, I had actually remembered that this has happened once before then i corrected it, thanks for your time. much appreciated
July 30, 2012 3:34:51 AM

I have the same problem.
I lost 2 cores of my 965BE and then another one went missing.
Tried everything except re installing windows and flashing the BIOS.
I googled and this has been happening since 2010.
But MS update win7 every day or two, so I don't really think that caused it. But maybe it did.
July 30, 2012 6:02:16 AM

I flashed the BIOS from 1101 t 1301 and the problem is gone. Awol cores are back where they belong.