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How can I tell if both cores are working

Last response: in CPUs
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July 8, 2011 12:24:52 AM

Hello,
I have a pentium dual core e5300 cpu and I have noticed that in task manager, under the performance tab, there is only one cpu usage history. I used to have 2. What test can I use to determine that both cores are, working?

More about : cores working

a b à CPUs
July 8, 2011 12:28:34 AM

checking task manager is the best way to see if you have both cores
recognized by the OS

Did you reinstall Windows?

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July 8, 2011 12:40:36 AM

not since I rebuilt my pc back in sept of 2010
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a b à CPUs
July 8, 2011 1:13:50 AM

So you had two cores showing in task manager after the install in sept of '10?

Assuming yes
then run msconfig
(type in run box or search box of start menu)
go to boot
go to advanced options and see how many cores it shows there
let me know what it says

right click on My Computer
go to manager
go to device manager
look under processors and see if it shows one or two

then go to computer
and and tell me what it says
for example my Windows 7 64-bit with a Core2Duo says "ACPI X64-based PC"
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July 8, 2011 1:31:35 AM

forgot to say I am still using xp home sp3
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a b à CPUs
July 8, 2011 1:54:16 AM

that is good to know
the instructions I gave apply to XP also
just use run under start menu
and type in "msconfig"
as far as I remember the MSCONFIG menu has stayed basically the same
so just follow instructions in above post

going to device manager is the same also
right click my computer on desktop or on start menu
go to manager
go to device manager
check under processor
and check under computer
and tell me what they say
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July 8, 2011 2:14:09 AM

under advanced options in boot.ini after checking /numproc (which I take as the number of processors) 1 appears

right clicking on my computer I bring up systems properties and clicking on the hardware tab I click on the device manager, which lists dualcorxpb under which is a category titled computer which has underneath it 2 items. first is acpi multiprocessor pc and second standard pc. when I click on either of those items I get a windows labeled properties, but no listing as to the number of cores.
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a b à CPUs
July 8, 2011 2:41:35 AM

check under the properties for the acpi multiprocessor
and see if the device is working properly
do the same for standard pc
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a b à CPUs
July 8, 2011 2:51:37 AM

this is worth reading
http://forums.techarena.in/xp-hardware/827896.htm

same problem you are having

pay particular attention to this
(Dont do anything yet)
changing your HAL to the wrong HAL can make your XP unbootable
do a new install of XP if that is an option would probably load the right HAL

Start device manager.
In device manager expand 'Computer'
Under Computer you should see the currently installed 'HAL' information
"Advanced Configuration and Power Interface (ACPI) PC" (as you indicated
below)
Right click the (ACPI)PC device and chose 'Update Driver'
Select the (Advance) radio button in the Hardware Update Wizard and click
next.
Select 'Don't search. I will choose the driver to install' and click next.
Make sure the "Show compatible hardware" check box is checked on the next
screen
Select the correct HAL for your system type and follow the instruction from
the wizard to complete the install.
(Caution) Installing an incompatible HAL could severely reduce you systems
performance and indeed force you to rebuild it. If ‘ACPI Multiprocessor PC’
is not a part of the choices then there might be a configuration in your BIOS
which is disabling the second core or you might need a BIOS update.

What I cant understand is why you are showing the multi and the standard
at the same time
If the multiprocessor says not working properly then I understand


it should just be the multiprocessor ACPI
unless you upgraded from a single core to dual core
when you installed your windows in Sept 10 did you have the same CPU?
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July 8, 2011 2:54:48 AM

under acpi multiprocessor pc properties device status it states "No drivers are installed for this device. ". under standard pc properties device status it states "This device is working properly."
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a b à CPUs
July 8, 2011 3:00:15 AM

well you can follow the instructions I posted above

EDIT - you want to update the driver on standard PC not the ACPI multiprocessor

"Start device manager.
In device manager expand 'Computer'
Under Computer you should see the currently installed 'HAL' information
"Advanced Configuration and Power Interface (ACPI) PC" (as you indicated
below)
Right click the (ACPI)PC device and chose 'Update Driver'
Select the (Advance) radio button in the Hardware Update Wizard and click
next.
Select 'Don't search. I will choose the driver to install' and click next.
Make sure the "Show compatible hardware" check box is checked on the next
screen
Select the correct HAL for your system type and follow the instruction from
the wizard to complete the install"

you want to pick the ACPI Multiprocessor

go as far as show compatible hardware and post back
what it says
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a b à CPUs
July 8, 2011 3:04:01 AM

Again
WARNING!!!
What you are doing could possibly damage your XP installation to the
point you would have to re-install with the proper XP disc
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July 8, 2011 3:16:44 AM

king smp said:
Again
WARNING!!!
What you are doing could possibly damage your XP installation to the
point you would have to re-install with the proper XP disc


just went through the update driver process for the apci and found "ACPI Multiprocessor PC" which I selected and installed. I am now having to restart my pc so I will be back in a few. thanks
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a b à CPUs
July 8, 2011 3:26:13 AM

I really hope you come back after trying Task Manager
and find two CPU usage windows :) 

It will make me happy
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July 8, 2011 3:27:48 AM

king smp said:
Again
WARNING!!!
What you are doing could possibly damage your XP installation to the
point you would have to re-install with the proper XP disc


I am back. I had to rework my nvidia control panel to get both monitors working, but I am now showing 2 cpu usage history screens. So thanks for the help.

mb230kc
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Best solution

a b à CPUs
July 8, 2011 3:41:15 AM

Awesome
I am glad it worked out good
If you liked my answer
then you can select me as Best Answer on the bottom of my post
Dont have to :) 

Should be a big difference in how the computer runs
almost twice as fast
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July 15, 2011 12:50:01 AM

Best answer selected by mb230kc.
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