r8g.4xlarge

Analysis

The r8g.4xlarge is a memory optimized instance in the r8g series with 16 vCPUs and 128 GiB of memory on AWS Graviton4 (up to 2.7 GHz), which makes it memory-heavy at 8 GiB of memory per vCPU.

Running it in Mumbai instead of São Paulo saves $613 a month per instance: $0.6606/hour against $1.50/hour, a 127% spread.

It is the cheapest of the 5 processor variants AWS sells at this size and generation. The r8a.4xlarge on AMD EPYC 9R45 costs 36% more, and the r8i-flex.4xlarge, the r8i.4xlarge and the r8gd.4xlarge also sit above it.

At $0.9426/hour on demand in US East (N. Virginia), about $688 a month, the r8g.4xlarge is one of the cheaper ways to buy memory optimized capacity: only 12% of the 385 current memory optimized types cost less per vCPU-hour than its $0.0589.

Compared with the previous generation, it costs 10% more than the r7g.4xlarge on AWS Graviton3 ($62.60 more a month per instance), in exchange for the newer processor. The newer r9g.4xlarge on AWS Graviton5 is 9.0% dearer at $1.03/hour.

Looking beyond its own line, 5 of 42 current types with 16 vCPUs and similar memory are cheaper. The cheapest of those is the r6g.4xlarge on AWS Graviton2 at $0.8064/hour.