We have a server which has four Intel Xeon E7 4860 CPU. Strangely, the model name in /proc/cpuinfo contains a 000 string instead of E4860.

Incorrect model name:

model name  : Genuine Intel(R) CPU             000  @ 2.27GHz

Correct model name:

model name  : Intel(R) Xeon(R) CPU           E5620  @ 2.40GHz

The servers runs Arch Linux with kernel 3.2.12

BTW, I digged into kernel source code and found the relevant information are retrieved using Intel CPUID instruction.

  • It might help you to search for "Linux kernel misdetects Intel Xeon as Genuine Intel" rather than focus on the /proc/cpuinfo API.
    – j13r
    Apr 5, 2012 at 14:33

2 Answers 2


Try the dmidecode command to compare results.

  • no, dmidecode has the same result as /proc/cpuinfo
    – yanglei
    Apr 5, 2012 at 15:15

How about the lshw command? Does that give you the model number?

  • no, the result is same as /proc/cpuinfo. This is because lshw internally parse /proc/cpuinfo
    – yanglei
    Apr 5, 2012 at 15:18
  • you are right. i guess /dev/cpu/*/cpuid will be the same deal then. i wonder if it is a kernel bug or something with the hardware itself. what if you boot up a livecd/liveusb with a different distro or even different OS, say windows 7?
    – johnshen64
    Apr 5, 2012 at 15:36

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