r8g.12xlarge
Memory optimized · r8g series · AWS Graviton4 Processor
- vCPU
- 48
- Memory
- 384 GiB
- Linux / hour
- $2.83
- Per month
- $2,064
- Per vCPU-hour
- $0.0589
- Per GiB-hour
- $0.00736
Analysis
The r8g.12xlarge is a memory optimized instance in the r8g series with 48 vCPUs and 384 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 $1,838 a month per instance: $1.98/hour against $4.50/hour, a 127% spread.
It is the cheapest of the 5 processor variants AWS sells at this size and generation. The r8a.12xlarge on AMD EPYC 9R45 costs 36% more, and the r8i-flex.12xlarge, the r8i.12xlarge and the r8gd.12xlarge also sit above it.
At $2.83/hour on demand in US East (N. Virginia), about $2,064 a month, the r8g.12xlarge 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.12xlarge on AWS Graviton3 ($188 more a month per instance), in exchange for the newer processor. The newer r9g.12xlarge on AWS Graviton5 is 9.0% dearer at $3.08/hour.
Looking beyond its own line, 5 of 40 current types with 48 vCPUs and similar memory are cheaper. The cheapest of those is the r6g.12xlarge on AWS Graviton2 at $2.42/hour.
Price by region (USD per hour)
| Region | Linux | Windows | 1-yr RI | 3-yr RI | |
|---|---|---|---|---|---|
| N. Virginia us-east-1 | $2.83 | – | $1.87 | $1.28 | |
| Ohio us-east-2 | $2.83 | – | $1.87 | $1.28 | |
| Oregon us-west-2 | $2.83 | – | $1.87 | $1.28 | |
| Canada Central ca-central-1 | $3.10 | – | $2.05 | $1.40 | |
| São Paulo sa-east-1 | $4.50 | – | $2.98 | $2.04 | |
| Ireland eu-west-1 | $3.16 | – | $2.09 | $1.44 | |
| London eu-west-2 | $3.32 | – | $2.20 | $1.50 | |
| Frankfurt eu-central-1 | $3.41 | – | $2.26 | $1.55 | |
| Mumbai ap-south-1 | $1.98 | – | $1.30 | $0.8990 | |
| Singapore ap-southeast-1 | $3.41 | – | $2.26 | $1.55 | |
| Sydney ap-southeast-2 | $3.39 | – | $2.24 | $1.54 | |
| Tokyo ap-northeast-1 | $3.41 | – | $2.26 | $1.55 |
Shared tenancy, no pre-installed software. Reserved rates are standard, no upfront, per hour. Prices as of 2026-11-04.
Same shape, other types
| Type | vCPU | Memory | $/hour | vs r8g.12xlarge |
|---|---|---|---|---|
| r6g.12xlarge AWS Graviton2 Processor | 48 | 384 GiB | $2.42 | -14% |
| r7g.12xlarge AWS Graviton3 Processor | 48 | 384 GiB | $2.57 | -9% |
| r5a.12xlarge AMD EPYC 7571 | 48 | 384 GiB | $2.71 | -4% |
| r6a.12xlarge AMD EPYC 7R13 Processor | 48 | 384 GiB | $2.72 | -4% |
| r6gd.12xlarge AWS Graviton2 Processor | 48 | 384 GiB | $2.76 | -2% |
| r5.12xlarge Intel Xeon Platinum 8175 | 48 | 384 GiB | $3.02 | +7% |
Cost calculator
Specs
| vCPU | 48 |
|---|---|
| Memory | 384 GiB (8.0 per vCPU) |
| Processor | AWS Graviton4 Processor |
| Clock | 2.7 GHz |
| Storage | EBS only |
| Network | 22.5 Gigabit |
r8g sizes
| r8g.medium | 1 vCPU | $0.0589 |
| r8g.large | 2 vCPU | $0.1178 |
| r8g.xlarge | 4 vCPU | $0.2356 |
| r8g.2xlarge | 8 vCPU | $0.4713 |
| r8g.4xlarge | 16 vCPU | $0.9426 |
| r8g.8xlarge | 32 vCPU | $1.89 |
| r8g.12xlarge | 48 vCPU | $2.83 |
| r8g.16xlarge | 64 vCPU | $3.77 |
| r8g.24xlarge | 96 vCPU | $5.66 |
| r8g.48xlarge | 192 vCPU | $11.31 |