r8i.24xlarge

Analysis

The r8i.24xlarge is a memory optimized instance in the r8i series with 96 vCPUs and 768 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.24xlarge on AWS Graviton4 costs $5.66/hour, 15% less ($739 a month), though switching means rebuilding software for arm64. The other variants are the r8gd.24xlarge at $7.05, the r8a.24xlarge at $7.67 and the r8id.24xlarge at $7.98.

Running it in N. Virginia instead of São Paulo saves $2,897 a month per instance: $6.67/hour against $10.64/hour, a 60% spread.

On demand it costs $6.67/hour in US East (N. Virginia), $4,868 a month if left running, which puts it mid-table for memory optimized types at the 33rd percentile per vCPU ($0.0695 per vCPU-hour) and the 45th percentile per GiB ($0.00868 per GiB-hour).

Compared with the previous generation, it costs 5.0% more than the r7i.24xlarge on Intel Xeon Scalable (Sapphire Rapids) ($232 more a month per instance), in exchange for the newer processor.

Looking beyond its own line, 8 of 35 current types with 96 vCPUs and similar memory are cheaper. The cheapest of those is the r5a.24xlarge on AMD EPYC 7571 at $5.42/hour.