c8g.4xlarge

Analysis

The c8g.4xlarge is a compute optimized instance in the c8g series with 16 vCPUs and 32 GiB of memory on AWS Graviton4 (up to 2.7 GHz), which makes it compute-heavy at 2 GiB of memory per vCPU.

Running it in Mumbai instead of São Paulo saves $398 a month per instance: $0.4318/hour against $0.9774/hour, a 126% spread.

It is the cheapest of the 5 processor variants AWS sells at this size and generation. The c8a.4xlarge on AMD EPYC 9R45 costs 35% more, and the c8i-flex.4xlarge, the c8i.4xlarge and the c8gd.4xlarge also sit above it.

At $0.6381/hour on demand in US East (N. Virginia), about $466 a month, the c8g.4xlarge is one of the cheaper ways to buy compute optimized capacity: only 17% of the 291 current compute optimized types cost less per vCPU-hour than its $0.0399.

Compared with the previous generation, it costs 10% more than the c7g.4xlarge on AWS Graviton3 ($42.40 more a month per instance), in exchange for the newer processor. The newer c9g.4xlarge on AWS Graviton5 is 9.0% dearer at $0.6955/hour.

Looking beyond its own line, 5 of 31 current types with 16 vCPUs and similar memory are cheaper. The cheapest of those is the c6g.4xlarge on AWS Graviton2 at $0.5440/hour.