r6g.16xlarge

Analysis

The r6g.16xlarge is a memory optimized instance in the r6g series with 64 vCPUs and 512 GiB of memory on AWS Graviton2 (up to 2.5 GHz), which makes it memory-heavy at 8 GiB of memory per vCPU.

Running it in Mumbai instead of São Paulo saves $2,238 a month per instance: $2.08/hour against $5.15/hour, a 147% spread.

Nothing else with 64 vCPUs and similar memory is cheaper: among 39 current same-shape types it has the lowest on-demand price.

At $3.23/hour on demand in US East (N. Virginia), about $2,355 a month, the r6g.16xlarge is one of the cheaper ways to buy memory optimized capacity: only 1% of the 385 current memory optimized types cost less per vCPU-hour than its $0.0504.

It is the cheapest of the 5 processor variants AWS sells at this size and generation. The r6id.16xlarge on Intel Xeon 8375C (Ice Lake) costs 50% more, and the r6a.16xlarge, the r6gd.16xlarge and the r6i.16xlarge also sit above it.

The newer r7g.16xlarge on AWS Graviton3 is 6.2% dearer at $3.43/hour.

Reserving it for a year with no upfront payment cuts the Linux rate to $2.03/hour, which beats on demand once it runs more than 63% of the time; three years brings it to $1.39/hour, 57% below on demand.