Upgrade from Core2Duo to Quad core only shows 2 cores in task manager (0/1)

  • Thread starter Thread starter I Drive Fast
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I Drive Fast

I recently upgraded my Vista64 Ultimate from an E8600 to a Q9550.

In the task manager, it only shows 2 cores.

Device Manager shows all 4 CPU's.
Bios shows all 4 CPU's.

Any ideas on how to correct this?

Attached are screen shots showing the problem.
 
I Drive Fast said:
I recently upgraded my Vista64 Ultimate from an E8600 to a Q9550.

In the task manager, it only shows 2 cores.

Device Manager shows all 4 CPU's.
Bios shows all 4 CPU's.

Any ideas on how to correct this?

Attached are screen shots showing the problem.
Click to expand...

Since Device Manager shows all 4 cores, there's probably no
problem with Vista itself. For a second opinion, get CPU-Z
from cpuid.com. If it reports 4 CPUs, the issue is with Task
Manager only. The fact that TM sees 2 cores indicates that the
system is correctly identified as an ACPI Multiprocessor system.
A check with Device Manager will confirm this.

Besides CPU info, CPU-Z gives detailed memory info.
 
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