OS: Windows 10

CPU: Intel xeon 8253


In task manager, it shows CPU cores as expected ( 16 cores, 32 threads, as spec ), but in the device manager - processor, it shows fewer CPUs, the number doesn't look like physical cores or threads.

Is that info(number) from BIOS?

  • 2
    Add screenshots to your post. – harrymc Jun 19 at 10:12
  • How many does device manager show? Without some information it is hard to know what is going on. Have you tried to count them? – Mokubai Jun 19 at 11:16
  • 29 in device manager. – Mark Jun 19 at 11:44
  1. ACPI bugs in your motherboard's BIOS can cause this problem. Ensure that you are running the latest BIOS/firmware for your motherboard.

  2. Make sure msconfig didn't limit the number of processors.

Task Manager shows one processor (and not multiple cores)

  1. If you just replaced the CPU, windows may not detect it:


  • for record and reference, it is a BIOS issue eventually. – Mark Jul 15 at 2:37

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