Skip to main content

Amazon EC2

Amazon EC2 C6i Instances

Compute optimized instances powered by 3rd Generation Intel Xeon Scalable processors

Get started with C6i Instances

Why Amazon EC2 C6i Instances?

Amazon EC2 C6i instances are powered by 3rd Generation Intel Xeon Scalable processors and deliver up to 15% better price performance than C5 instances for a wide variety of workloads. C6i instances feature a 2:1 ratio of memory to vCPU, similar to C5 instances. They support up to 128 vCPUs per instance, which is 33% more than C5 instances. These instances feature twice the networking bandwidth of C5 instances and are an ideal fit for compute-intensive workloads, such as batch processing, distributed analytics, high performance computing (HPC), ad serving, highly scalable multiplayer gaming, and video encoding.   

C6id instances have local NVMe-based SSD block-level storage for applications that need high-speed, low-latency local storage. Compared to the previous generation C5d instances, C6id instances offer up to 138% higher TB storage per vCPU and 56% lower cost per TB.                 

C6in instances offer up to 200 Gbps of network bandwidth and up to 2x higher packet-processing performance than C5n instances. These instances also deliver up to 100 Gbps bandwidth and up to 400K I/O operations per second (IOPS) of Amazon Elastic Block Store (EBS) performance, the fastest block storage performance on EC2. Take advantage of these performance gains to scale the performance and throughput of network-intensive workloads, such as distributed computing applications, network virtual appliances, data analytics, HPC, and CPU-based AI/ML.

Benefits

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 that you can use to consolidate workloads on fewer instances.

C6i instances add to the broadest and deepest selection of EC2 instances in the cloud and provide you 10 different instance sizes that feature varying amounts of vCPU, memory, networking, and storage. Choose from any of the sizes offered 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. AWS Nitro delivers practically all of the compute and memory resources of the host hardware to your instances for better overall performance and security.

Features

C6i instances are powered by 3rd Generation Intel Xeon Scalable processors (Ice Lake) with an all-core turbo frequency of 3.5 GHz. They 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 processing of cryptographic algorithms.

C6in instances offer up to 200 Gbps network bandwidth, up to 2x higher to comparable C5n instances. C6i instances provide up to 9% higher memory bandwidth per vCPU compared to C5 instances. You can also enable Elastic Fabric Adapter (EFA) in C6i and C6in instances on the 32xlarge and metal sizes.

C6id instances are equipped with up to 7.6 TB of local NVMe-based SSD block-level storage, and deliver up to 15% better price performance compared to previous generation instances. C6id are ideal for compute intensive workloads, including those that need access to high-speed, low-latency local storage. With C6in instances, you have access to up to 100 Gbps Amazon Elastic Block Store (EBS) bandwidth, up to 5.2x higher compared to C5n instances.

C6i

Amazon EC2 C6i and C6id instances are powered by 3rd Generation Intel Xeon Scalable processors (code named Ice Lake) with an all-core turbo frequency of 3.5 GHz, offer up to 15% better compute price performance over C5 instances, and always-on memory encryption using Intel Total Memory Encryption (TME).

Instance Size
vCPU
Memory (GiB)
Instance Storage (GB)
Network Bandwidth (Gbps)
EBS Bandwidth (Gbps)
c6i.large

2

4

EBS-Only

Up to 12.5

Up to 10
c6i.xlarge

4

8

EBS-Only

Up to 12.5

Up to 10
c6i.2xlarge

8

16

EBS-Only

Up to 12.5

Up to 10
c6i.4xlarge

16

32

EBS-Only

Up to 12.5

Up to 10
c6i.8xlarge

32

64

EBS-Only

12.5

10
c6i.12xlarge

48

96

EBS-Only

18.75

15
c6i.16xlarge

64

128

EBS-Only

25

20
c6i.24xlarge

96

192

EBS-Only

37.5

30
c6i.32xlarge

128

256

EBS-Only

50

40
c6i.metal
128
256
EBS-Only
50
40
c6id.large

2

4

1x118 NVMe SSD

Up to 12.5

Up to 10
c6id.xlarge

4

8

1x237 NVMe SSD

Up to 12.5

Up to 10
c6id.2xlarge

8

16

1x474 NVMe SSD

Up to 12.5

Up to 10
c6id.4xlarge

16

32

1x950 NVMe SSD

Up to 12.5

Up to 10
c6id.8xlarge

32

64

1x1900 NVMe SSD

12.5

10
c6id.12xlarge

48

96

2x1425 NVMe SSD

18.75

15
c6id.16xlarge

64

128

2x1900 NVMe SSD

25

20
c6id.24xlarge

96

192

4x1425 NVMe SSD

37.5

30
c6id.32xlarge

128

256

4x1900 NVMe SSD

50

40
c6id.metal
128
256
4x1900 NVMe SSD
50
40

C6in

Amazon EC2 C6in instances are powered by 3rd Generation Intel Xeon Scalable processors (Ice Lake) with an all-core turbo frequency of 3.5 GHz. C6in instances offer up to 200 Gbps of network bandwidth and up to 100 Gbps Amazon Elastic Block Store (EBS) bandwidth.

Instance Size
vCPU
Memory (GiB)
Instance Storage (GB)
Network Bandwidth (Gbps)
EBS Bandwidth (Gbps)
c6in.large

2

4

EBS-Only

Up to 25

Up to 25
c6in.xlarge

4

8

EBS-Only

Up to 30

Up to 25
c6in.2xlarge

8

16

EBS-Only

Up to 40

Up to 25
c6in.4xlarge

16

32

EBS-Only

Up to 50

Up to 25
c6in.8xlarge

32

64

EBS-Only

50

25
c6in.12xlarge

48

96

EBS-Only

75

37.5
c6in.16xlarge

64

128

EBS-Only

100

50
c6in.24xlarge

96

192

EBS-Only

150

75
c6in.32xlarge

128

256

EBS-Only

200*

100
c6in.metal

128

256

EBS-Only

200*

100

The 32xlarge and metal instance sizes support  Elastic Fabric Adapter (EFA). EFA is a network interface for Amazon EC2 instances that you can use to run applications that require high levels of inter-node communications, such as high performance computing (HPC) applications using Message Passing Interface (MPI) libraries, at scale on AWS.

*For 32xlarge and metal sizes, at least 2 elastic network interfaces, with each attached to a different network card, are required on the instance to achieve 200 Gbps throughput. Each network interface attached to a network card can achieve a maximum of 170 Gbps. For more information, see Network cards.