Have you gone into task manager performance view cpu history and selected
one graph per cpu?
"Phil (PM)" <pmitchel(nospam)@bigpond.net.au> wrote in message
news:...
> Hi all, I wonder if anyone can ellborate on some posts I just read and
> see if it could help my problem.
>
> wrote:
>
>>In article < om>,
>>says...
>>> When I initially installed Windows Vista Home Premium OEM, I had an
>>> Intel Pentium 4 650 (single core 3.4GHz) Processor installed in my
>>> system. I have since changed the system processor to a Pentium D 830
>>> (dual core 3.0GHz) processor. However, Windows is acting like it
>>> doesn't know my processor has a second core. Task Manager shows the
>>> CPU graph for only a single core and I have a Multi-core Windows
>>> Gadget that I've downloaded that shows Windows is only using a single
>>> core.
>>>
>>> I have googled forever to try and find a solution to no avail. I
>>> found a recommendation to use a tool called NTFS4DOS and rename the
>>> HAL.DLL file to something else and rename HALMACPI.DLL to HAL.DLL.
>>> That didn't work. I also tried re-installing Vista on top of itself
>>> (upgrading itself) and that had no affect.
>>>
>>> I have removed the entries for the Pentium 4 650 CPU in Device Manager
>>> and Windows Vista Home Premium now correctly identifies my CPU as a
>>> Pentium D 830, but it still only runs on the first core!!!!
>>>
>>> My system board is an ASUS P5ND2-SLI. It was also suggested to check
>>> in system BIOS to make sure there isn't a setting to disable one of
>>> the cores. I'm running the latest system BIOS from ASUS (1.06) and
>>> there is no such setting in my BIOS.
>>>
>>> I found articles that described systems with AMD processors that
>>> seemed to be more plagued with this problem, however, my CPU is
>>> definitely Intel and the suggested workarounds don't apply.
>>>
>>> I'm really not looking forward to formatting my 400GB HDDs and re-
>>> installing Windows Vista. It's now 3 months after the release of
>>> Windows Vista. Somebody must have seen this problem by now, I'd
>>> think, but I can't find a solution posted anywhere.
>>>
>>> Please help!!!!
>>>
>>You'll need the DVD in the drive.
> Vista DVD I assume
>>Open up Device Manager.
>>
>>Click the + next to computer.
>>
>>Right click on whatever entry is there (such as ACPI x86 based PC) and
>>select properties.
>>
>>Click on Driver Tab
>>
>>Click on Update Driver.
>>
>>Click on Browse My Computer
>>
>>Click on Let me pick from a list. You may need to untick the "Show
>>compatible hardware" box.
>>
>>Select the one appropriate, let it install a driver then reboot.
> Which one should we pick?
>
>
>
>
>
>
>
>
> Hi, I have same problem, Vista not using both cpu's,
> I have a D490 Intel Duel core, both are listed in device manager but
> if I click task manager and view performance, there is only one graph
> for CPU and I cannot change it to two
> Yet when I reinstalled XP Pro onto other HD last weekend and ran it,
> sure enough there was two graphs for cpu's
> Re your instructions above?
> What DVD?
> Vista Ultimate 64bit is what I have.
> I tried that
> Found ACPI x64 based PC, update drive, chose let me choose and browse
> my PC, but nothing was found.
>
> Did anyone fix this problem?
>
> if so, please post reply or email me at
> pmitche1(nospam)@bigpond.net.au
> remove (nospam)
>
> Thanks
>
> Phil
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