Amazon EC2 C6i Instances

C6i instances deliver up to 15% better price performance than C5 instances. C6i instances also offer new larger sizes with up to 128 vCPUs and 256 GiB of memory, enabling customers to consolidate workloads on less instances.

C6i instances add to the broadest and deepest selection of EC2 instances in the cloud and provide customers 10 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.

C6i 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.

C6i instances are powered by 3rd Generation Intel Xeon Scalable processors (code named Ice Lake) with an all-core turbo frequency of 3.5 GHz and include support for always-on memory encryption using Intel Total Memory Encryption (TME). C6i instances also support new Intel Advanced Vector Extensions (AVX-512) instructions for faster execution of cryptographic algorithms.

C6i instances support 40 Gbps bandwidth to Amazon Elastic Block Store (EBS) in the largest size and up to 10 Gbps in the four smallest sizes, which is more than double that of C5 instances. C6i instances also support up to 50 Gbps networking, which is twice that of C5 instances. C6i instances provide up to 9% higher memory bandwidth per vCPU compared to C5 instances. You can also enable Elastic Fabric Adapter (EFA) on the 32xlarge and metal sizes of C6i.

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.