VMware: Enhanced VMotion Compatibility (EVC) processor support (1003212)


Enhanced VMotion Compatibility (EVC) simplifies VMotion compatibility issues across CPU generations. EVC automatically configures server CPUs with Intel FlexMigration or AMD-V Extended Migration technologies to be compatible with older servers. After EVC is enabled for a cluster in the VirtualCenter inventory, all hosts in that cluster are configured to present identical CPU features and ensure CPU compatibility for VMotion. The features presented by each host are determined by selecting a predefined EVC baseline. VirtualCenter does not permit the addition of hosts that cannot be automatically configured to be compatible with the EVC baseline.


To use the EVC feature, you must be running ESX Server 3.5 Update 2 or higher with Virtual Center 2.5 Update 2 or higher and have only compatible processors that are listed in one of the following tables. EVC does not allow for migration with VMotion between Intel and AMD processors. Note the following restrictions:

  • The tables below are based upon public information. VMware has not verified all of these processors. For more information on which servers and processors are supported, see the Systems Compatibility Guide for ESX Server 3.5 and ESX Server 3i.
  • This list only covers server class processors compatible with the EVC baseline(s) and might not be a complete list.
  • You must ensure the BIOS settings for these processors enable Hardware Virtualization (if available) and Execute Protection. Default BIOS settings may not always enable these features. Hardware Virtualization is Intel VT on Intel processors and AMD-V on (supported) AMD processors. Execute Protection is Intel eXecute Disable (XD) on Intel processors and AMD No eXecute (NX) on AMD processors.

    This section contains the following subjects:

    Intel® Xeon® CPUs allowed in an EVC cluster

    Intel CPU Models

    EVC Baseline in ESX 3.5U2, ESX 3.5U3

    EVC Baseline in ESX 3.5U4

    Merom based CPUs

    Intel® Xeon® Processors numbered 72xx, 73xx

    Intel® Xeon® Processors numbered 51xx , 53xx

    Intel® Xeon® Processors numbered 30xx, 32xx

    Default for Intel Hosts

    Default for Intel Hosts

    Penryn based CPUs

    Intel® Xeon® Processors numbered 74xx

    Intel® Xeon® Processors numbered 52xx, 54xx

    Intel® Xeon® Processors numbered 33xx

    Nehalem based CPUs

    Intel® Xeon® Processors numbered 55xx

    Intel® Xeon® Processors numbered 35xx

    AMD Opteron™ CPUs allowed in an EVC Cluster

    AMD CPU Models

    EVC Baseline in ESX 3.5U2, ESX 3.5U3

    EVC Baseline in ESX 3.5U4

    First Generation AMD Opteron ™CPUs (Rev.E)

    1yy , 2yy, 8yy

    Default for AMD hosts

    Default for AMD hosts

    Second Generation AMD Opteron ™ CPUs (Rev.F)

    12yy, 22yy, 82yy

    Third Generation AMD Opteron™ based CPUs (Greyhound)

    13yy, 23yy, 83yy

    * The “yy” in the AMD Opteron models numbers are based on the clock frequency


    See the following VMware references for information on the following subjects:

    Also, see the following third-party references:

    Other references:

    Source: 1003212

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