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Amazon EC2

Amazon EC2 C6a Instances

Compute optimized instances powered by third generation AMD EPYC processors

Get started with C6a Instances

Why Amazon EC2 C6a Instances?

Amazon EC2 C6a instances are powered by 3rd generation AMD EPYC processors, deliver up to 15% better price performance compared to C5a instances, and offer 10% lower cost than comparable x86-based EC2 instances. C6a instances feature a 2:1 ratio of memory to vCPU, just like C5a instances and support increased sizes up to 192 vCPUs per instance, which is double that of C5a instances. These instances feature more than twice the network bandwidth of C5a instances, and are designed for compute-intensive workloads such as batch processing, distributed analytics, high performance computing (HPC), ad serving, highly-scalable multiplayer gaming, and video encoding.

AWS and AMD Partnership

AWS and AMD continue to collaborate to provide customers with cloud services that are designed to meet current and future computing requirements. Please visit the AWS/AMD partner page for more information.

Benefits

C6a instances deliver up to 15% better price performance than C5a instances and 10% lower cost than comparable x86-based EC2 instances. C6a instances also offer new larger sizes with up to 192 vCPUs and 384 GiB of memory, enabling you to consolidate workloads on fewer instances and save on per core licensing costs.

C6a instances add to the broadest and deepest selection of EC2 instances in the cloud and provide customers 11 different instance sizes that feature varying amounts of vCPU, memory, networking, and storage. This enables customers to run a broad range of compute-intensive workloads.

C6a instances are built on the AWS Nitro System, a combination of dedicated hardware and lightweight hypervisor which delivers practically all of the compute and memory resources of the host hardware to your instances for better overall performance and security.

Features

Amazon EC2 C6a instances are powered by 3rd generation AMD EPYC processors (code named Milan) with an all-core turbo frequency of 3.6 GHz and include support for AMD Transparent Single Key Memory Encryption (TSME), which encrypts data in physical memory. C6a instances support the new Advanced Vector Extension (AVX-2) instructions for faster execution of cryptographic algorithms. They also support AMD SEV-SNP. For more information about AMD SEV-SNP and pricing, refer to this documentation.

The largest size of C6a instances supports 40 Gbps bandwidth to Amazon Elastic Block Store (EBS), which is more than double that of C5a instances. C6a instances also support up to 50 Gbps networking, which is 2.5 times that of C5a instances. Customers can also enable Elastic Fabric Adapter (EFA) on the 48xlarge size of C6a.

The AWS Nitro System is a rich collection of building blocks that offloads many of the traditional virtualization functions to dedicated hardware and software to deliver high performance, high availability, and high security while also reducing virtualization overhead.

C6a Product details

Amazon EC2 C6a instances are powered by 3rd generation AMD EPYC processors and are designed for compute-intensive workloads.

Instance Size
vCPU
Memory (GiB)
Instance Storage (GB)
Network Bandwidth (Gbps)
EBS Bandwidth (Gbps)
c6a.large
2
4
EBS-Only
Up to 12.5
Up to 10
c6a.xlarge
4
8
EBS-Only
Up to 12.5
Up to 10
c6a.2xlarge
8
16
EBS-Only
Up to 12.5
Up to 10
c6a.4xlarge
16
32
EBS-Only
Up to 12.5
Up to 10
c6a.8xlarge
32
64
EBS-Only
12.5
10
c6a.12xlarge
48
96
EBS-Only
18.75
15
c6a.16xlarge
64
128
EBS-Only
25
20
c6a.24xlarge
96
192
EBS-Only
37.5
30
c6a.32xlarge
128
256
EBS-Only
50
40
c6a.48xlarge
192
384
EBS-Only
50
40
c6a.metal
192
384
EBS-Only
50
40