r6g.4xlarge

Analysis

The r6g.4xlarge is a memory optimized instance in the r6g series with 16 vCPUs and 128 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 $559 a month per instance: $0.5200/hour against $1.29/hour, a 147% spread.

Nothing else with 16 vCPUs and similar memory is cheaper: among 42 current same-shape types it has the lowest on-demand price.

At $0.8064/hour on demand in US East (N. Virginia), about $589 a month, the r6g.4xlarge 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.4xlarge on Intel Xeon 8375C (Ice Lake) costs 50% more, and the r6a.4xlarge, the r6gd.4xlarge and the r6i.4xlarge also sit above it.

The newer r7g.4xlarge on AWS Graviton3 is 6.2% dearer at $0.8568/hour.

Reserving it for a year with no upfront payment cuts the Linux rate to $0.5080/hour, which beats on demand once it runs more than 63% of the time; three years brings it to $0.3484/hour, 57% below on demand.