Why xp can't find the 2nd cpu?

[nabla]

I installed a 2nd cpu, but winxp seems not recognize it.
What shuould I do?
Thanks!

 

[mechBgon]

First of all, are you using XP Professional? XP Home doesn't support dual CPUs.

I haven't tried making the transition myself, but I seem to remember that you can go into Device Manager, go into the properties of Computer, and change the "driver" from uniprocessor to multiprocessor. If it's labelled ACPI Uniprocessor, make sure to pick ACPI Multiprocessor and not a non-ACPI one. It would be a good idea to back up your stuff in case this doesn't work and you end up reinstalling Windows.

 

[nabla]

Originally posted by: mechBgon
First of all, are you using XP Professional? XP Home doesn't support dual CPUs.

I haven't tried making the transition myself, but I seem to remember that you can go into Device Manager, go into the properties of Computer, and change the "driver" from uniprocessor to multiprocessor. If it's labelled ACPI Uniprocessor, make sure to pick ACPI Multiprocessor and not a non-ACPI one. It would be a good idea to back up your stuff in case this doesn't work and you end up reinstalling Windows.

I am using pro now, but I have no idea how to go into the properties of Computer.
Thanks!

 

[mechBgon]

I'm handicapped by not having an XP machine that I can use to give you instructions on how to get there, and I haven't worked with XP enough to have it memorized. Try clicking Start > Help and search for help on "Device Manager." It will probably allow you to launch Device Manager directly from Help.

 

[nabla]

Originally posted by: mechBgon
I'm handicapped by not having an XP machine that I can use to give you instructions on how to get there, and I haven't worked with XP enough to have it memorized. Try clicking Start > Help and search for help on "Device Manager." It will probably allow you to launch Device Manager directly from Help.

Do you mean I should update driver of "computer" in device manager? But Where can I find the multiple processor driver?

 

[mechBgon]

Tell it to show all available drivers so you can choose the one you want. There should be a list of about six types, if it's like Windows 2000.

 

[IdahoB]

Start - Control Panel - System - Hardware tab - Device Manager

Click on the + symbol next to computer, right click on ACPI UniProcessor and select Scan for Hardware Change. If that doesn't work - make sure your BIOS is correctly identifying the new 2nd CPU

 

[nabla]

Originally posted by: IdahoB
Start - Control Panel - System - Hardware tab - Device Manager

Click on the + symbol next to computer, right click on ACPI UniProcessor and select Scan for Hardware Change. If that doesn't work - make sure your BIOS is correctly identifying the new 2nd CPU

In Device Manager, Processors category shows there are two processers. But when I use "Scan for Hardware Change", nothing changed, and the computer category shows "acpi PC". When I update driver for it, there are only two I can select from, ACPI PC and standard pc.
no Where to get the ACPI Multiprocessor dirver.

 

[mechBgon]

Does Task Manager show two separate CPU-usage graphs on the Performance tab? If so, Windows is seeing both CPUs.

 

[nabla]

Originally posted by: mechBgon
Does Task Manager show two separate CPU-usage graphs on the Performance tab? If so, Windows is seeing both CPUs.

No,
and When I unselect "show compatible hardware", there are still two selections as before.

 

[mechBgon]

When I update driver for it, there are only two I can select from, ACPI PC and standard pc.
no Where to get the ACPI Multiprocessor dirver.

Did you tell it to show all drivers so you can select the one you want? Err, wait, sounds like you did. I think I'd reinstall Windows over itself at this point. That should preserve your programs and files while giving Windows a fresh grip on the hardware.

 

[nabla]

Originally posted by: mechBgon

When I update driver for it, there are only two I can select from, ACPI PC and standard pc.
no Where to get the ACPI Multiprocessor dirver.

Did you tell it to show all drivers so you can select the one you want?

Yes, I did.

 

[nabla]

I will reinstall win2000 tomorrow.
Thanks for all you guys.

 

[dkozloski]

I have a couple of copies of WinXP Home Edition and after installing SP1 I noticed that Multiprocessor ACPI is one of the choices under updating drivers. I wonder if it works. Has anybody tried it?

 

[Spleenus]

Nabala, you're going to install Win2k when ur running WinXP? Why?