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Windows 7: 8-core PC but only 4 processors being used

26 Oct 2010   #11
Hopalong X

Windows7 Pro 64bit SP-1; Windows XP Pro 32bit
 
 

PeaB4

You have four cores and 8 threads. Windows shows all 8 threads as seperate processors.
Hyper Threading.

Intel® Hyper-Threading Technology: Your Questions Answered - Intel® Software Network


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26 Oct 2010   #12
pparks1

Windows 7 Ultimate x64
 
 

Quote   Quote: Originally Posted by PeaB4YouGo View Post
I use W7 Home Prem, I have a 4 core i7 processor and I see 8 processors running in nearly ALL my processor monitors. Each core has two processors. That is the way I understood it would work BEFORE I bought the system. Is Wiki wrong, this time?
You have a single physical processor with 4 logical cores and hyper threading enabled thus showing you 8 total CPU's.

In the case of this user, he has 2 physical CPU's with 4 logical cores on each one. Windows Home Premium is limited to 1 physical CPU socket...thus only 1 of his CPU's can be used.

You will need to move to Windows 7 Professional or Ultimate.
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26 Oct 2010   #13
Layback Bear

Windows 7 Pro. 64/SP-1
 
 

Thanks pparks1 I get it now. Nice to know information for next build.
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26 Oct 2010   #14
sygnus21

Windows 10 Pro
 
 

Sorry, I'm a little confused the OP's answer here....

Quote   Quote: Originally Posted by ECS1 View Post
Maybe I have two of them?

Not sure about the tech details - 8 of them show up under "processors" in Device Manager, and under Windows XP when I ran task manager, under "performances" you could see all 8 working. Now it's only 4.
Is the OP asking the question, or giving the answer???

I "assume" the OP has two based on the other info given, but...

Just my way of thinking
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26 Oct 2010   #15
stormy13
Microsoft MVP

Win 7 Ultimate x64
 
 

sygnus21, pparks1 hit the answer,

Quote   Quote: Originally Posted by pparks1 View Post

In the case of this user, he has 2 physical CPU's with 4 logical cores on each one. Windows Home Premium is limited to 1 physical CPU socket...thus only 1 of his CPU's can be used.

You will need to move to Windows 7 Professional or Ultimate.
he just needed to go a little further with what the OP said about all 8 cores showing up and active in XP. Don't forget that XP Pro supported up to 2 sockets as well (and was a never ending source of confusion and debate with regards to XP Home when dual cores started coming out, which Home supported no problem).
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26 Oct 2010   #16
sygnus21

Windows 10 Pro
 
 

@stormy13,

That I understood, and given the info as a whole, I agree. It's just that question he posed

Thanks
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 8-core PC but only 4 processors being used




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