Problem with dual core cpu

[optionfa]

Hello, I recently put together a new PC and I cant seem to get both my cores from my core2 duo e6600 cpu working. I have a nforce 680i sli mobo and my BIOS is Pheonix - Award BIOS v6.00PG (running windows XP pro SP2).

Now I came to the conclusion that only one of my cores is working from only seeing one graph on task manager, and also when i go into my BIOS only the second core from the top is ENABLED, the other one is not even selectable to enable/disable.

When I go into device manager, under computer I have Advanced Configuration and Power Interface (ACPI) PC, I have a feeling that this may be where my problem lies as I may need to change this to Multiprocessor PC or what not, but I don't have an option to do so when I try and change the driver.

I have read posts from others with similar problems with their dual core CPUs and have yet to get a fix that works for my situation, I would prefer to avoid having to reinstall my OS as I just finished loading up all my programs on this new PC only to find out im running only one core .

 

[newtekie1]

Under Device Manager go to "System", it should have "ACPI Multiprocessor PC" listed under it. If it has "ACPI Uniprocessor PC" listed then that is your problem.

There is a way to reload that, but it is complicated and can end up screwing your OS anyway, so it is really recommended to just reformat.

 

[optionfa]

Under Device Manager go to "System", it should have "ACPI Multiprocessor PC" listed under it. If it has "ACPI Uniprocessor PC" listed then that is your problem.

There is a way to reload that, but it is complicated and can end up screwing your OS anyway, so it is really recommended to just reformat.

Thank you for the fast reply, and I appologise for what may sound as another ignorant question, but the closest thing in my device manager list is "system devices" and the only ACPI.... listed is "ACPI fixed feature button".

I was under the impression that "ACPI Multiprocessor PC" belonged under the 'Coumputer" tab in the device manger, unfortunatly I dont have it there ither its "Advanced Configuration and Power Interface (ACPI) PC".