Amazon EC2 instance type naming conventions - Amazon EC2
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Amazon EC2 instance type naming conventions

Amazon EC2 provides a variety of instance types so you can choose the type that best meets your requirements. Instance types are named based on their family, generation, processor family, additional capabilities, and size. The first position of the instance type name indicates the instance family, for example c. The second position indicates the instance generation, for example 7. The third position indicates the processor family, for example g. The remaining letters before the period indicate additional capabilities, such as instance store volumes. After the period (.) is the instance size, such as small or 4xlarge, or metal for bare metal instances.

The image shows the instance type c7gn.xlarge, with a label for each part of the instance name.
Instance families Processor families Additional capabilities
  • C – Compute optimized

  • D – Dense storage

  • F – FPGA

  • G – Graphics intensive

  • Hpc – High performance computing

  • I – Storage optimized

  • Im – Storage optimized (1 to 4 ratio of vCPU to memory)

  • Is – Storage optimized (1 to 6 ratio of vCPU to memory)

  • Inf – Amazon Inferentia

  • M – General purpose

  • Mac – macOS

  • P – GPU accelerated

  • R – Memory optimized

  • T – Burstable performance

  • Trn – Amazon Trainium

  • U – High memory

  • VT – Video transcoding

  • X – Memory intensive

  • a – AMD processors

  • g – Amazon Graviton processors

  • i – Intel processors

  • b – Block storage optimization

  • d – Instance store volumes

  • e – Extra storage or memory

  • flex – Flex instance

  • n – Network and EBS optimized

  • q – Qualcomm inference accelerators

  • z – High performance