comparing t4g.medium, t3a.medium, and t3.medium


the t4g.medium, t3a.medium, and t3.medium are all part of Amazon's EC2 T-series instances, which are designed to provide a baseline level of CPU performance with the ability to burst above the baseline when needed. However, they differ in the underlying processor architecture and some other characteristics. Below is a comparative table:

Instance TypeCPU TypevCPUsMemory (GiB)ProcessorNetwork BandwidthEBS Bandwidth
t4g.mediumARM-based24Graviton2Up to 5 GbpsUp to 3.5 Gbps
t3a.mediumAMD-based24AMD EPYC 7000 seriesUp to 5 GbpsUp to 3.5 Gbps
t3.mediumIntel-based24Intel Xeon Scalable (Skylake and Broadwell options)Up to 5 GbpsUp to 3.5 Gbps

Key Differences:

  1. Processor Architecture:

    • t4g.medium uses ARM-based Graviton2 processors.
    • t3a.medium uses AMD EPYC 7000 series processors.
    • t3.medium uses Intel Xeon Scalable processors.
  2. Price:

    • t3a.medium instances are generally cheaper than t3.medium instances but offer similar performance characteristics.
    • t4g.medium instances are also generally cost-effective due to the efficiency of the Graviton2 processor.
  3. Performance:

    • The ARM-based Graviton2 processors in t4g.medium instances are designed for better power efficiency.
    • Both AMD and Intel options in t3a and t3 are more traditional and have been in use for longer periods, and their performance characteristics are well understood.
  4. Compatibility:

    • Software that is dependent on specific instruction sets might not be compatible with ARM-based processors, so t3 and t3a could be a safer bet for those applications.

For the most current and accurate information, it's always best to consult the official AWS EC2 documentation or pricing pages.

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