r7iz.32xlarge

Analysis

The r7iz.32xlarge is a memory optimized instance in the r7iz series with 128 vCPUs and 1024 GiB of memory on Intel Xeon Scalable (Sapphire 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 r7a.32xlarge on AMD EPYC 9R14 costs $9.74/hour, 18% less ($1,581 a month).

Running it in N. Virginia instead of Tokyo saves $1,916 a month per instance: $11.90/hour against $14.53/hour, a 22% spread. It is not offered in Canada Central, São Paulo, London, Mumbai, Singapore and Sydney, so plan around that if you need a presence there.

On demand it costs $11.90/hour in US East (N. Virginia), $8,690 a month if left running, which puts it mid-table for memory optimized types at the 68th percentile per vCPU ($0.0930 per vCPU-hour) and the 84th percentile per GiB ($0.0116 per GiB-hour).

Looking beyond its own line, 8 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 the largest of the 8 r7iz sizes. Dropping to the r7iz.16xlarge saves $4,345 a month.

Reserving it for a year with no upfront payment cuts the Linux rate to $7.50/hour, which beats on demand once it runs more than 63% of the time; three years brings it to $4.91/hour, 59% below on demand. Windows Server roughly adds 49% to the bill at $17.79/hour, because the licence is charged per vCPU.