c8i.24xlarge

Analysis

The c8i.24xlarge is a compute optimized instance in the c8i series with 96 vCPUs and 192 GiB of memory on Intel Xeon Scalable (Granite Rapids) (up to 3.9 GHz), which makes it compute-heavy at 2 GiB of memory per vCPU.

Within the same generation and size, the c8g.24xlarge on AWS Graviton4 costs $3.83/hour, 15% less ($489 a month), though switching means rebuilding software for arm64. The other variants are the c8gd.24xlarge at $4.70, the c8a.24xlarge at $5.17 and the c8id.24xlarge at $5.32.

Running it in Mumbai instead of São Paulo saves $1,777 a month per instance: $4.50/hour against $6.93/hour, a 54% spread.

Windows Server roughly doubles the bill at $8.91/hour, because the licence is charged per vCPU.

On demand it costs $4.50/hour in US East (N. Virginia), $3,284 a month if left running, which puts it mid-table for compute optimized types at the 47th percentile per vCPU ($0.0469 per vCPU-hour) and the 50th percentile per GiB ($0.0234 per GiB-hour).

Compared with the previous generation, it costs 5.0% more than the c7i.24xlarge on Intel Xeon Scalable (Sapphire Rapids) ($156 more a month per instance), in exchange for the newer processor.

Looking beyond its own line, 8 of 22 current types with 96 vCPUs and similar memory are cheaper. The cheapest of those is the c6a.24xlarge on AMD EPYC 7R13 at $3.67/hour.