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Windows 7: 8 Core Processor only registers as 1?

20 Dec 2015   #11

Win-7-Pro64bit 7-H-Prem-64bit

Yep seems a normal boot to me on quad or 6 core intel cpu :/

Have you checked your power plan or saved desktop theme to see if it's changed ?
Most people would use a performance power plan and keep boot as normal
Go to control panel and power plan to see what it's set on switch to performance and see how it goes the system should adjust to needs automatically if not you might have an issue but I doubt it's with the boot options.

My System SpecsSystem Spec
20 Dec 2015   #12

Windows 7 Pro 64 bit

In the advanced boot options dialog the number shown for "Number of Processors" will always be 1 by default, regardless of the number you actually have. With the checkbox unchecked which is the default condition it will use all available cores. If the box is checked it will limit the cores to the number shown. In post #7 the box is checked which will limit the cores to 1. The box should be unchecked except for diagnostic and testing purposes, not normal use.
My System SpecsSystem Spec
20 Dec 2015   #13

W10 Pro x64, W7 Pro x64 in VMware

How many cores does the OP see in Task Manager - Performance ? Should look like this (ignore cpu 100% - I'm rendering ATM)

8 Core Processor only registers as 1?-8cores.jpg

My System SpecsSystem Spec

20 Dec 2015   #14
Layback Bear

Windows 10 Pro. 64/ version 1709 Windows 7 Pro/64

As LMiller7 has stated. Remove the check mark from Number of Processors.

It should look like the picture in whs post #6. NO check marks.
My System SpecsSystem Spec
20 Dec 2015   #15

Windows 10 Pro x64 x3, Ubuntu

It should also give the option of 1 to 8 cores with the option ticked - which it appears not to do - which would indicate that there is an issue as also indicated by the program that initially brought this to the OP's attention
My System SpecsSystem Spec
20 Dec 2015   #16

Win 7 64bit

Has your settings changed in BOIS settings? But I think your board has UEFI. This happened to me once & for some reason the multi core cpu support was disabled so I only was using the 1. So simply enable it & leave the cores 1-8 left on auto & when you exit, will immediately switch off then back on again & your core's should be restored. That is, if this is the problem you have. But I've never come across missing cores unless its a failing cpu! But I have the exact same CPU & mine runs great!
My System SpecsSystem Spec
20 Dec 2015   #17

W7 home premium 32bit/W7HP 64bit/w10 tp insider ring

Agree with the Barman thats why i posted the screenshot, Even my dual core option is not greyed out.

My System SpecsSystem Spec
20 Dec 2015   #18

Windows 10 Pro x64 x3, Ubuntu

I have a similar 4GHz 8350 and mine shows all eight cores as selectable options in the drop-down, which is why I assume all in the series should show the same :)
My System SpecsSystem Spec
20 Dec 2015   #19
Microsoft MVP

Vista, Windows7, Mint Mate, Zorin, Windows 8

It will show "1" - regardless of what you do.
My System SpecsSystem Spec
20 Dec 2015   #20

W7 home premium 32bit/W7HP 64bit/w10 tp insider ring

Mine must be defective then.


Attached Thumbnails
8 Core Processor only registers as 1?-processors.png  
My System SpecsSystem Spec

 8 Core Processor only registers as 1?

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