r8id.12xlarge

Analysis

The r8id.12xlarge is a memory optimized instance in the r8id series with 48 vCPUs and 384 GiB of memory on Intel Xeon Scalable (Granite Rapids) (up to 3.9 GHz), which makes it memory-heavy at 8 GiB of memory per vCPU.

Within the same generation and size, the r8g.12xlarge on AWS Graviton4 costs $2.83/hour, 29% less ($850 a month), though switching means rebuilding software for arm64. The other variants are the r8i-flex.12xlarge at $3.17, the r8i.12xlarge at $3.33 and the r8gd.12xlarge at $3.53.

Running it in N. Virginia instead of Tokyo saves $607 a month per instance: $3.99/hour against $4.82/hour, a 21% spread. It is not offered in São Paulo and Singapore, so plan around that if you need a presence there.

It has local instance storage (1 x 2850 GB NVMe SSD), which is fast but lost when the instance stops. Network: 22500 Megabit.

On demand it costs $3.99/hour in US East (N. Virginia), $2,914 a month if left running, which puts it mid-table for memory optimized types at the 54th percentile per vCPU ($0.0832 per vCPU-hour) and the 71st percentile per GiB ($0.0104 per GiB-hour).

Looking beyond its own line, 22 of 40 current types with 48 vCPUs and similar memory are cheaper. The cheapest of those is the r6g.12xlarge on AWS Graviton2 at $2.42/hour.