x8i.12xlarge
Memory optimized · x8i series · Intel Xeon Scalable (Granite Rapids)
- vCPU
- 48
- Memory
- 768 GiB
- Linux / hour
- $5.25
- Per month
- $3,834
- Per vCPU-hour
- $0.1094
- Per GiB-hour
- $0.00684
Analysis
The x8i.12xlarge is a memory optimized instance in the x8i series with 48 vCPUs and 768 GiB of memory on Intel Xeon Scalable (Granite Rapids) (up to 3.9 GHz), which makes it very memory-heavy at 16 GiB of memory per vCPU.
Running it in N. Virginia instead of São Paulo saves $3,642 a month per instance: $5.25/hour against $10.24/hour, a 95% spread. It is not offered in Canada Central and London, so plan around that if you need a presence there.
Within the same generation and size, the x8g.12xlarge on AWS Graviton4 costs $4.69/hour, 11% less ($410 a month), though switching means rebuilding software for arm64. The other variants are the x8aedz.12xlarge at $13.81.
Per vCPU it is one of the dearer memory optimized types: 84% of the 385 current types in the family cost less than its $0.1094 per vCPU-hour. The premium mostly pays for the extra memory per vCPU. On demand it is $5.25/hour in US East (N. Virginia), or $3,834 for a 730-hour month.
It is size 6 of 12 in the x8i series. Stepping up to the x8i.16xlarge gives 64 vCPUs and 1024 GiB for $1,278 more a month. Dropping to the x8i.8xlarge saves $1,278 a month. Unit price is not flat across the series ($0.1094 to $0.1269 per vCPU-hour), so the size changes the rate you pay.
Price by region (USD per hour)
| Region | Linux | Windows | 1-yr RI | 3-yr RI | |
|---|---|---|---|---|---|
| N. Virginia us-east-1 | $5.25 | $7.46 | – | – | |
| Ohio us-east-2 | $5.25 | $7.46 | – | – | |
| Oregon us-west-2 | $5.25 | $7.46 | – | – | |
| São Paulo sa-east-1 | $10.24 | $12.45 | – | – | |
| Ireland eu-west-1 | $6.30 | $8.51 | – | – | |
| Frankfurt eu-central-1 | $7.35 | $9.56 | – | – | |
| Mumbai ap-south-1 | $5.42 | $7.63 | – | – | |
| Singapore ap-southeast-1 | $7.62 | $9.82 | – | – | |
| Sydney ap-southeast-2 | $7.62 | $9.82 | – | – | |
| Tokyo ap-northeast-1 | $7.62 | $9.82 | – | – |
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 x8i.12xlarge |
|---|---|---|---|---|
| x2gd.12xlarge AWS Graviton2 Processor | 48 | 768 GiB | $4.01 | -24% |
| x8g.12xlarge AWS Graviton4 Processor | 48 | 768 GiB | $4.69 | -11% |
| hpc7a.24xlarge AMD EPYC 9R14 Processor | 48 | 768 GiB | $7.20 | +37% |
Cost calculator
Specs
| vCPU | 48 |
|---|---|
| Memory | 768 GiB (16.0 per vCPU) |
| Processor | Intel Xeon Scalable (Granite Rapids) |
| Clock | 3.9 GHz |
| Storage | EBS only |
| Network | 22500 Megabit |
x8i sizes
| x8i.large | 2 vCPU | $0.2188 |
| x8i.xlarge | 4 vCPU | $0.4377 |
| x8i.2xlarge | 8 vCPU | $0.8753 |
| x8i.4xlarge | 16 vCPU | $1.75 |
| x8i.8xlarge | 32 vCPU | $3.50 |
| x8i.12xlarge | 48 vCPU | $5.25 |
| x8i.16xlarge | 64 vCPU | $7.00 |
| x8i.24xlarge | 96 vCPU | $10.50 |
| x8i.32xlarge | 128 vCPU | $14.01 |
| x8i.48xlarge | 192 vCPU | $21.01 |
| x8i.64xlarge | 256 vCPU | $28.01 |
| x8i.96xlarge | 384 vCPU | $48.74 |