Windows 2003 SBS Says I have more than two processors, but I only have two.

Today I installed Windows 2003 SBS on a Dell Poweredge 2650 server with two Xeon 3 gHz processors.   The SBS installation program issues a warning:

This computer has more than two processors.  It goes on to warn that it will not use more than two processors.

According to the BIOS setup (and to my physical inspection) the server has only two processors.

This is the second Dell Poweredge on which I've observed this problem.


(1) Why does SBS see more than two processors when there are, in fact, only two?

(2) Will it use both processors?
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

ejfiedlerAuthor Commented:
I found this on the Microsoft website:

(1) It reads dual core processors as being two separate processors, hence my systems have looked like four.

(2) It will use both processors.

For more info see:;en-us;909382
Lee W, MVPTechnology and Business Process AdvisorCommented:
You are wrong.  And you are correct.  The 2650 is not a Dual Core system - it IS a HYPER-THREADED System.  HyperThreading is also viewed as two CPUs per PHYSICAL single CPU.  The problem WILL appear with a Dual Core CPU as well (as noted in the article).  Further, as noted in the article, two Dual Core, Hyper-Threaded CPUs will be seen as 8 TOTAL CPUs and SBS will use all 8.

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
ignore the warning. Hyperthreading is turned on and the OS sees it as 4 processors. It will drive on happily despite the warning
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today

From novice to tech pro — start learning today.

Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.