r8i.32xlarge

Analysis

The r8i.32xlarge is a memory optimized instance in the r8i series with 128 vCPUs and 1024 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.

It is the cheapest of the 5 processor variants AWS sells at this size and generation. The r8idn.32xlarge on Intel Xeon Scalable (Granite Rapids) costs 69% more, and the r8id.32xlarge, the r8ib.32xlarge and the r8in.32xlarge also sit above it.

Running it in N. Virginia instead of São Paulo saves $3,863 a month per instance: $8.89/hour against $14.18/hour, a 60% spread.

On demand it costs $8.89/hour in US East (N. Virginia), $6,490 a month if left running, which puts it mid-table for memory optimized types at the 31st percentile per vCPU ($0.0695 per vCPU-hour) and the 44th percentile per GiB ($0.00868 per GiB-hour).

Looking beyond its own line, 2 of 14 current types with 128 vCPUs and similar memory are cheaper. The cheapest of those is the r6a.32xlarge on AMD EPYC 7R13 at $7.26/hour.

It is size 9 of 11 in the r8i series. Stepping up to the r8i.48xlarge gives 192 vCPUs and 1536 GiB for $3,245 more a month. Dropping to the r8i.24xlarge saves $1,623 a month.