c7gn.4xlarge

Analysis

The c7gn.4xlarge is a compute optimized instance in the c7gn series with 16 vCPUs and 32 GiB of memory on AWS Graviton3 (up to 2.6 GHz), which makes it compute-heavy at 2 GiB of memory per vCPU.

Within the same generation and size, the c7g.4xlarge on AWS Graviton3 costs $0.5800/hour, 42% less ($305 a month). The other variants are the c7i-flex.4xlarge at $0.6783, the c7i.4xlarge at $0.7140 and the c7gd.4xlarge at $0.7258.

Compared with the previous generation, it costs 44% more than the c6gn.4xlarge on AWS Graviton2 ($224 more a month per instance), in exchange for the newer processor. The newer c8gn.4xlarge on AWS Graviton4 is 5.0% cheaper at $0.9480/hour, which makes the c7gn.4xlarge hard to justify for new deployments.

Running it in N. Virginia instead of Tokyo saves $190 a month per instance: $0.9984/hour against $1.26/hour, a 26% spread. It is not offered in Canada Central, São Paulo, Frankfurt, Mumbai, Singapore and Sydney, so plan around that if you need a presence there.

Per vCPU it is one of the dearer compute optimized types: 87% of the 291 current types in the family cost less than its $0.0624 per vCPU-hour. The premium mostly pays for a newer processor or a specialised configuration. On demand it is $0.9984/hour in US East (N. Virginia), or $729 for a 730-hour month.