Updated Coreinfo useful for Hyper-V systems

Updated Coreinfo useful for Hyper-V systems

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Mark Russinovich has posted an updated version of the “Coreinfo” tool in the Sysinternals suite.  You can read more about it (and download it from) here:


The latest version adds a very useful option for Hyper-V systems.  The “-v” parameter – which displays information about the virtualization-related features which the physical processor supports.  This is particularly useful if you are trying to determine if your system supports second level address translation (needed for Remote FX and running 3D intensive applications in the parent partition).


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  • Thanks for the update info.

  • Cheers for the update Ben.

    May read this as making sure you have a SLAT capable processor if you wish to run Windows 8 + Hyper-V and 3D intensive apps.  Wondering outloud, would this also be relevant for apps that make use of the GPU for hardware acceleration, such as IE9/10 with HTML 5 rendering?



  • Hi! I have following output of coreinfo -v command:

    Intel(R) Core(TM)2 Quad CPU    Q6600  @ 2.40GHz

    Intel64 Family 6 Model 15 Stepping 11, GenuineIntel

    HYPERVISOR      *       Hypervisor is present

    VMX             -       Supports Intel hardware-assisted virtualization

    EPT             -       Supports Intel extended page tables

    What does it mean? Does it mean that the CPU VMX is missing? I have Hyper-V role installed and run several VMs on that PC. So the CPU has hardware-assisted virtualization as I understand. So what is VMX here? What is HYPERVISOR?


  • @Ivan


    If you see a - the feature is missing. SLAT/EPT is supported starting with Intel i Core CPUs. SLAT/EPT is afaik required for RemoteFX. Ben can tell you more.

  • @Ivan

    If you are running Hyper-V at the moment then the CPU detection app reports "Hypervisor" but cannot then report on the functions of the CPU that Hyper-V has monopolised, such as VMX  (not sure about EPT, but since you have a Core 2, as Andre said, you won't have EPT anyway).

    The root Windows partition that you're in is patially virtualised.  That is, it runs on top of the hypervisor but still gets direct access to hardware that other virtual machines can't get.

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