r6id.4xlarge

Analysis

The r6id.4xlarge is a memory optimized instance in the r6id series with 16 vCPUs and 128 GiB of memory on Intel Xeon 8375C (Ice Lake) (up to 3.5 GHz), which makes it memory-heavy at 8 GiB of memory per vCPU.

Within the same generation and size, the r6g.4xlarge on AWS Graviton2 costs $0.8064/hour, 33% less ($294 a month), though switching means rebuilding software for arm64. The other variants are the r6a.4xlarge at $0.9072, the r6gd.4xlarge at $0.9216 and the r6i.4xlarge at $1.01.

Running it in N. Virginia instead of Singapore saves $184 a month per instance: $1.21/hour against $1.46/hour, a 21% spread. It is not offered in Canada Central and São Paulo, so plan around that if you need a presence there.

On demand it costs $1.21/hour in US East (N. Virginia), $883 a month if left running, which puts it mid-table for memory optimized types at the 43rd percentile per vCPU ($0.0756 per vCPU-hour) and the 59th percentile per GiB ($0.00945 per GiB-hour).

It has local instance storage (1 x 950 GB NVMe SSD), which is fast but lost when the instance stops. Network: Up to 12500 Megabit.

Looking beyond its own line, 19 of 42 current types with 16 vCPUs and similar memory are cheaper. The cheapest of those is the r7g.4xlarge on AWS Graviton3 at $0.8568/hour.