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Intel Core Duo 6850 - Second Core Disabled!

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phrozenfearz   01-16-2008 at 04:58:01 AM

Hello forum.

This is a continuation of another forum topic (link below), but more aptly named regarding the (newly identified) problem.
http://www.tomshardware.com/forum/ [...] -upgrading

I am running an Intel Core Duo 6850 processor, but only one of the cores is functioning!

I'm running Windows XP Professional and have tried to install the "hotfix" released by Microsoft.
http://support.microsoft.com/kb/896256

Please help! I'm stumped!

Thanks in advance,
phrzn

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Evilonigiri   01-16-2008 at 05:42:44 AM
- 0 +

There may be an option in the bios that disabled it. Look for it in there.

 

If that's not the case,...let me get back to you on that.

 

EDIT: Oh if that doesn't work, install the latest bios version for your motherboard.


Message edited by Evilonigiri on 01-16-2008 at 05:44:25 AM
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cfvh600   01-16-2008 at 05:44:21 AM
- 0 +

What motherboard do you have? Your BIOS recognising the CPU correctly?Did you re-install windows XP or is it an old installation?

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phrozenfearz   01-16-2008 at 05:45:54 AM
- 0 +

@Evilonigiri - I just checked that. In bios it is enabled. It's once I get to Windows and run the Intel Processor ID program that it is disabled.

Reply to phrozenfearz
phrozenfearz   01-16-2008 at 05:48:54 AM
- 0 +

@cfvh600 - My motherboard is an eVGA 780i SLI ready motherboard. I'm pretty sure the BIOS is recognizing it, but I'm not 100% sure how to check.

I "re"-installed Windows for the first time (so it's a fresh install, not an old one). So.. that shouldn't be the problem.

Reply to phrozenfearz
croc   01-16-2008 at 06:19:15 AM
- 0 +

phrozenfearz wrote :

Hello forum.

This is a continuation of another forum topic (link below), but more aptly named regarding the (newly identified) problem.
http://www.tomshardware.com/forum/ [...] -upgrading

I am running an Intel Core Duo 6850 processor, but only one of the cores is functioning!

I'm running Windows XP Professional and have tried to install the "hotfix" released by Microsoft.
http://support.microsoft.com/kb/896256

Please help! I'm stumped!

Thanks in advance,
phrzn



SP 2?

Reply to croc
phrozenfearz   01-16-2008 at 06:24:44 AM
- 0 +

@croc - Yes. My Computer Properties reads:
System:
Microsoft Windows XP
Professional
Version 2002
Service Pack 2

Reply to phrozenfearz
imnotageek   01-16-2008 at 07:06:33 AM
- 0 +

Just curious, how do we know if WinXP is utilising dual core? Suddenly I have this urge to verify.

Reply to imnotageek
phrozenfearz   01-16-2008 at 07:11:08 AM
- 0 +

I'm using Intel's Processor Identification software, available here:
http://downloadcenter.intel.com/Pr [...] 1&lang=eng

Please tell me if yours is registering both cores as enabled.

Reply to phrozenfearz
aevm   01-16-2008 at 07:15:34 AM
- 0 +

@imnotageek:
Ctrl-Alt-Del to open Task Manager, click the Performance tab. If you only see one chart, open the View menu and pick CPU History, then One Graph Per CPU. Of course, to actually see two or more cores working you need to run some programs. Try DVD Shrink for example, that one uses all 4 cores on my box.


Message edited by aevm on 01-16-2008 at 07:17:35 AM
Reply to aevm
cfvh600   01-16-2008 at 11:27:43 AM
- 0 +

Perhaps the Intel Processor Identification Software doesn't detect your CPU correctly. In Windows Task Manager, do you see 2 charts for the CPU usage? Also see what CPU-Z says.

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 Reply to cfvh600
kashan santhe   01-16-2008 at 12:17:54 PM
- 0 +

I registered only to reply to this one as I know how frustrating this problem can be.

I had exactly the same thing 2 months ago.

Check in the device manager that your computer is an "ACPI Multiprocessor PC".
If it is not, I am afraid you will have to reinstall windows in order to change that parameter.

I am at work now, so I can't be more specific (poor memory, other stuff bugging me), but if this suggestion is interesting to you, I can dig up details later on.

Greets

Reply to kashan santhe
phrozenfearz   01-16-2008 at 03:49:45 PM
- 0 +

@cfvh - CPU-Z also says that there is only one core. Task manager reveals only one chart for CPU usage.

@kashan santhe - Yes, it is quite frustrating. I would really appreciate any help you can give me!

Device manager is reading:
Processors:
Intel(R) Core(TM)2 DUO CPU E6850 @ 3.00GHz
Intel(R) Core(TM)2 DUO CPU E6850 @ 3.00GHz

I do not see the "ACPI Multiprocessor PC" anywhere... Please provide more information!

Reply to phrozenfearz
Grimmy   01-16-2008 at 03:55:53 PM
- 0 +

In the device manager, expand computer.

That's where you could see, ACPI Multiprocessor PC.

But since you expanded the processors, and it shows 2 there, then the right HAL is installed.... So more then likely it does say Multiprocessor PC. If it showed one, then it should say Uniprocessor PC.

Hmmmmm...

Reply to Grimmy
phrozenfearz   01-16-2008 at 04:02:17 PM
- 0 +

Yes, device manager reads:
Computer:
Advanced Configuration and Power Interface (ACPI) PC

:/ Any ideas, anybody?

Reply to phrozenfearz
Grimmy   01-16-2008 at 04:23:51 PM
- 0 +

Your Confusing me.. :heink:

 

What does it exactly say when you expand computer?

 

This is what mine shows:

 

http://members.cox.net/fade.2.black/temp/DV.jpg

 

Is that what it shows?

 

Edit:

 

More info from MS:

 

HAL options after Windows XP or Windows Server 2003 Setup

 

If it says:

 

"Advanced Configuration and Power Interface (ACPI) PC", ACPI PIC HAL (Halacpi.dll)

 

Which is for:
Standard PC
Advanced Configuration and Power Interface (ACPI) PC

 

Then you have the wrong hal version installed... Which means you should format, and reinstall Windows, with the right Bios settings, making sure you have ACPI management enabled.


Message edited by Grimmy on 01-16-2008 at 04:36:14 PM
Reply to Grimmy
phrozenfearz   01-16-2008 at 04:32:23 PM
- 0 +

No, it reads exactly what I just typed. I don't have anywhere to upload a screenshot, but it reads:

 

"Advanced Configuration and Power Interface (ACPI) PC" where yours reads "ACPI Multiprocessor PC"

 

Is this the problem?

 

edit:

 

After reading that Microsoft article - I think this is definitely the problem. Is there any way to update this without reinstalling? When I go to "Update Driver" and choose the driver myself, I can only choose from:

 

Advanced Configuration and Power Interface (ACPI) PC
Standard PC

 

Even when I uncheck the "Show compatible hardware" box.

 

Any ideas?


Message edited by phrozenfearz on 01-16-2008 at 04:36:43 PM
Reply to phrozenfearz
Grimmy   01-16-2008 at 04:35:40 PM
- 0 +

Yep..

 

Edit:

 

I did edit my previous post with more info.

 

Hope that helps.


Message edited by Grimmy on 01-16-2008 at 04:36:45 PM
Reply to Grimmy
phrozenfearz   01-16-2008 at 04:37:43 PM
- 0 +

Is there any way to do this without reinstalling? My Windows XP disk is unavailable to me until late Thursday night.

 

edit: By the way, thank you *very* much for your help. I've been working on this issue for almost two days now. I truly appreciate it, as well as everyone else who contributed to this and the first topic.


Message edited by phrozenfearz on 01-16-2008 at 04:39:09 PM
Reply to phrozenfearz
phrozenfearz   01-17-2008 at 01:59:22 AM
- 0 +

Alright, guys. I did as everyone suggested and finally reinstalled (I went and got my XP CD) and now the dual cores are working.

Thanks for everybody's help!

Reply to phrozenfearz
aevm   01-18-2008 at 12:42:58 AM
- 0 +

Just curious, is there a sane reason for doing this??? I tried hard and couldn't imagine one :)

Reply to aevm
D_C_W   09-13-2008 at 01:13:10 AM
- 0 +

Good thread. I registered just to make this comment. XP task manager does NOT show per-core processor usage. You only get multiple multiple CPU usage if you have multiple CPUs as in workstation/server grade motherboards. However, the latest Sysinternals process explorer does show the core level activity.

For some reason, XP SP3 actually did manage a swapout to multicore for me. I went from an P4 in a ASUS/VIA chipset board to a E7200 in an Intel DP35DP board. It thrashed a long time on initial boot but came up with most everything set. I then had to spend time ripping out all the old drivers but the basic install seems solid. ;)

Reply to D_C_W
aevm   09-13-2008 at 03:22:23 AM
- 0 +

My XP's Task Manager has a "View" menu, and in it I have an option called CPU history. There I can choose one chart for the whole processor or one chart per core. Do you have some weird version of XP, or did you just not know this trick?

Reply to aevm
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