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    Elastic Compute Service:CPU options for high clock speed instance types

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    Elastic Compute Service:CPU options for high clock speed instance types

    Last Updated:Apr 15, 2026

    Valid physical CPU core counts and threads-per-core values for high clock speed instance types.

    hfg8i instance types

    Instance type

    Default number of vCPUs

    Valid values for the number of physical CPU cores

    Default number of threads per core

    Valid values for the number of threads per core

    ecs.hfg8i.large

    2

    1

    2

    1 and 2

    ecs.hfg8i.xlarge

    4

    2

    2

    1 and 2

    ecs.hfg8i.2xlarge

    8

    4

    2

    1 and 2

    ecs.hfg8i.3xlarge

    12

    6

    2

    1 and 2

    ecs.hfg8i.4xlarge

    16

    8

    2

    1 and 2

    ecs.hfg8i.6xlarge

    24

    12

    2

    1 and 2

    ecs.hfg8i.8xlarge

    32

    16

    2

    1 and 2

    ecs.hfg8i.16xlarge

    64

    32

    2

    1 and 2

    ecs.hfg8i.32xlarge

    128

    64

    2

    1 and 2

    hfc8i instance types

    Instance type

    Default number of vCPUs

    Valid values for the number of physical CPU cores

    Default number of threads per core

    Valid values for the number of threads per core

    ecs.hfc8i.large

    2

    1

    2

    1 and 2

    ecs.hfc8i.xlarge

    4

    2

    2

    1 and 2

    ecs.hfc8i.2xlarge

    8

    4

    2

    1 and 2

    ecs.hfc8i.3xlarge

    12

    6

    2

    1 and 2

    ecs.hfc8i.4xlarge

    16

    8

    2

    1 and 2

    ecs.hfc8i.6xlarge

    24

    12

    2

    1 and 2

    ecs.hfc8i.8xlarge

    32

    16

    2

    1 and 2

    ecs.hfc8i.16xlarge

    64

    32

    2

    1 and 2

    ecs.hfc8i.32xlarge

    128

    64

    2

    1 and 2

    hfr8i instance types

    Instance type

    Default number of vCPUs

    Valid values for the number of physical CPU cores

    Default number of threads per core

    Valid values for the number of threads per core

    ecs.hfr8i.large

    2

    1

    2

    1 and 2

    ecs.hfr8i.xlarge

    4

    2

    2

    1 and 2

    ecs.hfr8i.2xlarge

    8

    4

    2

    1 and 2

    ecs.hfr8i.3xlarge

    12

    6

    2

    1 and 2

    ecs.hfr8i.4xlarge

    16

    8

    2

    1 and 2

    ecs.hfr8i.6xlarge

    24

    12

    2

    1 and 2

    ecs.hfr8i.8xlarge

    32

    16

    2

    1 and 2

    ecs.hfr8i.16xlarge

    64

    32

    2

    1 and 2

    ecs.hfr8i.32xlarge

    128

    64

    2

    1 and 2

    References

    • After you obtain the valid values for the number of physical CPU cores and the number of threads per core for an instance type, you can change the CPU options of the instance type based on your business requirements. For more information, see Change CPU options.

    • Hyper-threading (HT) enables two threads to concurrently run on a single physical CPU core as vCPUs. To create an ECS instance that uses only physical CPU cores, disable HT for the instance. For more information, see Specify CPU options.