Amazon Web Services has further expanded its usage of AMD EPYC-based machines for its Elastic Compute Cloud (EC2) instances. Last week the company started to offer its new EPYC-powered T3a instances, which enable customers to balance their instance mix based on cost and the amount of throughput they require at a given moment.

AWS’s T3a instances offer burstable performance and are intended for workloads that have low sustained throughput needs, but experience temporary spikes in usage. Amazon says that users of T3a get an assured baseline amount of processing power and can scale it up “to full core performance” when they need more for as long as necessary.

T3a instances are offered in seven sizes in the US East (N. Virginia), US West (Oregon), Europe (Ireland), US East (Ohio), and Asia Pacific (Singapore) Regions in On-Demand, Spot, and Reserved Instance form. The specifications look as follows:

This is Amazon’s third announcement of AMD EPYC-powered instances. Previously AWS started to offer M5, R5, M5ad, and R5ad instances based on AMD’s latest server processors.

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Source: Amazon Web Services

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  • coder543 - Wednesday, May 1, 2019 - link

    > Amazon's guidance is that the T3a instances have lower clocks than the T3 and don't offer the same max performance

    I can't find that guidance anywhere. Can you provide a link? And are you sure you're not talking about the A1 instance types that are based on Amazon's Graviton ARM processors? Because I think you got them mixed up.
    Reply
  • Irata - Thursday, May 2, 2019 - link

    Checking Amazon, both look identical except for AVX-512 support.
    - 2.5 Ghz CPU speed is listed for both T3 and T3a, memory and network speed seems to be the same.
    Reply
  • reuthermonkey1 - Thursday, May 2, 2019 - link

    Indeed. I'm only aware of the A1 instances being notably inferior to the others. the C5a, M5a, and now T3a's are generally similar performance-wise. Someworkloads are better, some are worse. Overall similar for 10% less. Reply
  • Philmatic - Wednesday, May 1, 2019 - link

    It's generally around 10%: https://www.ec2instances.info/?filter=t3&cost_... Reply

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