r9gd.4xlarge

Analysis

The r9gd.4xlarge is a memory optimized instance in the r9gd series with 16 vCPUs and 128 GiB of memory on AWS Graviton5 (up to 3.3 GHz), which makes it memory-heavy at 8 GiB of memory per vCPU.

Within the same generation and size, the r9g.4xlarge on AWS Graviton5 costs $1.03/hour, 20% less ($185 a month).

Running it in N. Virginia instead of Frankfurt saves $189 a month per instance: $1.28/hour against $1.54/hour, a 20% spread. It is not offered in Canada Central, São Paulo, Ireland, London, Mumbai, Singapore, Sydney and Tokyo, so plan around that if you need a presence there.

Compared with the previous generation, it costs 9.0% more than the r8gd.4xlarge on AWS Graviton4 ($77.20 more a month per instance), in exchange for the newer processor.

It has local instance storage (1 x 950 GB NVMe SSD), which is fast but lost when the instance stops. Network: Up to 17 Gigabit.

Looking beyond its own line, 24 of 42 current types with 16 vCPUs and similar memory are cheaper. The cheapest of those is the r6g.4xlarge on AWS Graviton2 at $0.8064/hour.

On demand it costs $1.28/hour in US East (N. Virginia), $935 a month if left running, which puts it mid-table for memory optimized types at the 51st percentile per vCPU ($0.0801 per vCPU-hour) and the 67th percentile per GiB ($0.0100 per GiB-hour).