Amazon EC2 C7a Instances

Compute optimized instances powered by 4th generation AMD EPYC processors
Get started with C7a Instances

Why Amazon EC2 C7a Instances?

Amazon EC2 C7a instances, powered by 4th generation AMD EPYC processors, deliver up to 50% higher performance compared to C6a instances. These instances support AVX-512, VNNI, and bfloat16, which enable support for more workloads, use Double Data Rate 5 (DDR5) to enable high-speed access to data in memory, and deliver 2.25x more memory bandwidth compared to C6a instances.

One of the major differences between C7a instances and the previous generations of instances, such as C6a instances, is their vCPU to physical processor core mapping. Every vCPU on a C7a instance is a physical CPU core. This means there is no Simultaneous Multi-Threading (SMT). By contrast, every vCPU on prior generations such as C6a instances is a thread of a CPU core.

C7a instances are ideal for high performance, compute-intensive workloads such as batch processing, distributed analytics, high performance computing (HPC), ad serving, highly-scalable multiplayer gaming, and video encoding.

Intro to Amazon EC2 instances powered by 4th Generation AMD EPYC processors

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

Benefits

C7a instances deliver a major leap in performance with up to 50% higher performance than C6a instances. Leveraging high performance cores can help you lower time to market for product development and enables you to consolidate workloads on fewer instances.

C7a instances deliver a significant price performance improvement compared to C6a instances. Better price performance enables you to reduce your fleet size or use smaller instance sizes to lower costs while improving performance.

C7a instances add to the broadest and deepest selection of EC2 instances in the cloud and come in 12 different sizes, including a bare-metal variant, that feature varying amounts of vCPU, memory, networking, and storage. This enables you to run a broad range of compute-intensive workloads.

Features

C7a instances are powered by 4th generation AMD EPYC processors (code named Genoa) with a maximum frequency of 3.7 GHz. C7a instances include support for always-on memory encryption using AMD secure memory encryption (SME).

C7a instances use leading edge DDR5 memory and deliver 2.25x more memory bandwidth compared to C6a instances. C7a instances support up to 40 Gbps bandwidth to Amazon EBS and up to 50 Gbps of networking bandwidth. And with C7a instances, you can attach up to 128 EBS volumes to an instance (compared to C6a which allowed up to 28 EBS volume attachments to an instance).

C7a instance offer new capabilities including AVX-512, VNNI, and bfloat16, which enable support for more workloads including convolutional neural network-based algorithms, financial analytics, and video encoding.

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.

Product Details

Amazon EC2 C7a instances are powered by 4th generation AMD EPYC processors and are an ideal fit for compute-intensive workloads.

Instance Size vCPU Memory (GiB) Instance Storage (GB) Network Bandwidth (Gbps) EBS Bandwidth (Gbps)

c7a.medium

1

2

EBS-Only

Up to 12.5

Up to 10

c7a.large

2

4

EBS-Only

Up to 12.5

Up to 10

c7a.xlarge

4

8

EBS-Only

Up to 12.5

Up to 10

c7a.2xlarge

8

16

EBS-Only

Up to 12.5

Up to 10

c7a.4xlarge

16

32

EBS-Only

Up to 12.5

Up to 10

c7a.8xlarge

32

64

EBS-Only

12.5

10

c7a.12xlarge

48

96

EBS-Only

18.75

15

c7a.16xlarge

64

128

EBS-Only

25

20

c7a.24xlarge

96

192

EBS-Only

37.5

30

c7a.32xlarge

128

256

EBS-Only

50

40

c7a.48xlarge

192

384

EBS-Only

50

40

c7a.metal-48xl

192

384

EBS-Only

50

40

Customer testimonials

Here is an example of how customers and partners have achieved their business agility, price performance, cost savings, and sustainability goals with Amazon EC2 C7a instances.

  • Amagi

    Amagi offers end-to-end cloud-managed live and on-demand video infrastructure for TV and Over-the-Top (OTT) media services. We strive to keep our infrastructure up-to-date with the latest generation of Amazon EC2 instances and run exhaustive benchmarking tests on instances as soon as they are launched. We recently tested the Amazon C7a instances powered by the 4th generation AMD EPYC processors, and our tests show that Amazon C7a instances deliver 40-50% higher performance over prior generation C6a instances when considering real-world use cases. This increased performance has resulted in up to 35% cost savings compared to existing Amazon C5a instances.

    Arpit Malani, Engineering Manager, Amagi