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Windows 7: 3 CPU cores and not 4?

16 Jan 2012   #1

Windows 7 x64 RC1, Vista Ultimate, XP Pro
3 CPU cores and not 4?

I have a AMD 955 Quad but now it's only showing 3 cores on my gadget. Is there a way to check this out so I'm wondering if there is something wrong with my CPU?

My System SpecsSystem Spec

16 Jan 2012   #2

Windows 7 Ultimate x64

Open your task manager and go to the Performance tab. At the top under cpu usage history, you should have a balck box with a green grid for each core you have. If it only shows 3 and you have a quad, your CPU may be defective.
My System SpecsSystem Spec
16 Jan 2012   #3

Windows 7 Ultimate 64bit

There is also a setting in BIOS to turn on and off individual cores. One of your cores may be turned off.
My brothers AMD 6 core had one turned off in the BIOS when it was first put together. Found the setting and enabled it.
Have no idea why 1 core was disabled on a new motherboard but it was.
My System SpecsSystem Spec

16 Jan 2012   #4
Microsoft MVP

Windows 7 Ultimate X64 SP1

The gadget may be malfunctioning too. Download CPUID - System & hardware benchmark, monitoring, reporting and see what it tells you.
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My System SpecsSystem Spec

 3 CPU cores and not 4?

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