r7a.8xlarge

Analysis

The r7a.8xlarge is a memory optimized instance in the r7a series with 32 vCPUs and 256 GiB of memory on AMD EPYC 9R14 (up to Up to 3.7 GHz), which makes it memory-heavy at 8 GiB of memory per vCPU.

Within the same generation and size, the r7g.8xlarge on AWS Graviton3 costs $1.71/hour, 30% less ($526 a month), though switching means rebuilding software for arm64. The other variants are the r7i.8xlarge at $2.12, the r7gd.8xlarge at $2.18 and the r7iz.8xlarge at $2.98.

Compared with the previous generation, it costs 34% more than the r6a.8xlarge on AMD EPYC 7R13 ($453 more a month per instance), in exchange for the newer processor. The newer r8a.8xlarge on AMD EPYC 9R45 is 5.0% dearer at $2.56/hour.

Running it in N. Virginia instead of Frankfurt saves $367 a month per instance: $2.43/hour against $2.94/hour, a 21% 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 $2.43/hour in US East (N. Virginia), $1,777 a month if left running, which puts it mid-table for memory optimized types at the 46th percentile per vCPU ($0.0761 per vCPU-hour) and the 62nd percentile per GiB ($0.00951 per GiB-hour).