db.r8g.12xlargevsdb.r8i.12xlarge
db.r8g.12xlarge is 9% cheaper than db.r8i.12xlarge on demand in US East (N. Virginia), saving $411.72 a month. Per vCPU, db.r8g.12xlarge costs 54% less. They use different processor architectures (arm64 and x86_64), so software built for one may need rebuilding to run on the other.
| At a glance | db.r8g.12xlarge | db.r8i.12xlarge |
|---|---|---|
| On-demand | $5.736/hr9% less | $6.30/hr |
| Lowest rate | $2.696/hr9% less3-yr reserved, no upfront | $2.961/hr3-yr reserved, no upfront |
| Size | 48 vCPUs, 384 GiB | 24 vCPUs, 384 GiB |
| Processor | AWS Graviton4 | Intel Xeon Scalable (Granite Rapids) |
| Architecture | arm64 | x86_64 |
Prices in US East (N. Virginia)
“Off” is the discount against each type’s own on-demand price. PostgreSQL, USD per hour.
| Option | db.r8g.12xlarge | db.r8i.12xlarge | db.r8i.12xlarge vs db.r8g.12xlarge |
|---|---|---|---|
| On-demandPay by the hour | $5.736 | $6.30 | ▲ 10% |
| 1-yr reservedNo upfront | 33% off$3.843 | 33% off$4.221 | ▲ 10% |
| 3-yr reservedNo upfront | 53% off$2.696 | 53% off$2.961 | ▲ 10% |
| 1-yr savings planHourly commitment | 20% off$4.589 | 20% off$5.04 | ▲ 10% |
Key differences
The biggest lead each one has.
Where db.r8g.12xlarge leads
On-demand price$5.736 vs $6.30 per hour
9% cheapervCPUs48 vs 24
2× higherWhere db.r8i.12xlarge leads
Sustained clock3.9 GHz vs 2.8 GHz
39% higherSpecs
11 of 24 specs differ. Those are in bold.
| Compute7 of 8 differ | db.r8g.12xlarge | db.r8i.12xlarge |
|---|---|---|
| vCPUs | 48 | 24 |
| Physical cores | 48 | 24 |
| Threads per core | 1 | 2 |
| Architecture | arm64 | x86_64 |
| Processor | AWS Graviton4 | Intel Xeon Scalable (Granite Rapids) |
| CPU maker | AWS | Intel |
| Sustained clock | 2.8 GHz | 3.9 GHz |
| Burstable | No | No |
| MemoryAll 1 match | db.r8g.12xlarge | db.r8i.12xlarge |
|---|---|---|
| Memory (GiB) | 384 | 384 |
| Networking1 of 3 differ | db.r8g.12xlarge | db.r8i.12xlarge |
|---|---|---|
| Network | 22.5 Gigabit | 22500 Megabit |
| Network baseline | 22.5 Gbps | 22.5 Gbps |
| Network peak | 22.5 Gbps | 22.5 Gbps |
| StorageAll 7 match | db.r8g.12xlarge | db.r8i.12xlarge |
|---|---|---|
| Storage | EBS Only | EBS Only |
| EBS baseline bandwidth | 15,000 Mbps | 15,000 Mbps |
| EBS max bandwidth | 15,000 Mbps | 15,000 Mbps |
| EBS baseline throughput | 1,875 MB/s | 1,875 MB/s |
| EBS max throughput | 1,875 MB/s | 1,875 MB/s |
| EBS baseline IOPS | 60,000 | 60,000 |
| EBS max IOPS | 60,000 | 60,000 |
| Instance details2 of 4 differ | db.r8g.12xlarge | db.r8i.12xlarge |
|---|---|---|
| Family | r8g | r8i |
| Category | Memory optimized | Memory optimized |
| Current generation | Yes | Yes |
| Normalization factor | 192 | – |
| Other1 of 1 differ | db.r8g.12xlarge | db.r8i.12xlarge |
|---|---|---|
| Hardware Basis | r8g.12xlarge | r8i.12xlarge |
On-demand prices by region
Cheapest for db.r8g.12xlarge first. PostgreSQL, USD per hour.
| Region | db.r8g.12xlarge | db.r8i.12xlarge | Difference |
|---|---|---|---|
| US East (N. Virginia)Used in summaryus-east-1 | $5.736 | $6.30 | ▲ 10% |
| US East (Ohio)us-east-2 | $5.736 | $6.30 | ▲ 10% |
| US West (Oregon)us-west-2 | $5.736 | $6.30 | ▲ 10% |
| Asia Pacific (Malaysia)ap-southeast-5 | $5.856 | $6.43 | ▲ 10% |
| EU (Stockholm)eu-north-1 | $5.88 | $6.476 | ▲ 10% |
| Canada (Central)ca-central-1 | $6.197 | $6.80 | ▲ 10% |
| EU (Ireland)eu-west-1 | $6.432 | $7.06 | ▲ 10% |
| Europe (Spain)eu-south-2 | $6.432 | $7.06 | ▲ 10% |
| US West (N. California)us-west-1 | $6.432 | $7.06 | ▲ 10% |
| Asia Pacific (Hyderabad)ap-south-2 | $6.528 | $7.18 | ▲ 10% |
| Asia Pacific (Mumbai)ap-south-1 | $6.528 | $7.18 | ▲ 10% |
| EU (Paris)eu-west-3 | $6.73 | $7.41 | ▲ 10% |
| EU (London)eu-west-2 | $6.732 | $7.41 | ▲ 10% |
| Asia Pacific (Seoul)ap-northeast-2 | $6.886 | $7.56 | ▲ 10% |
| Asia Pacific (Singapore)ap-southeast-1 | $6.888 | $7.56 | ▲ 10% |
| Asia Pacific (Sydney)ap-southeast-2 | $6.888 | $7.56 | ▲ 10% |
| Asia Pacific (Tokyo)ap-northeast-1 | $6.888 | $7.56 | ▲ 10% |
| EU (Frankfurt)eu-central-1 | $6.984 | $7.69 | ▲ 10% |
| Europe (Zurich)eu-central-2 | $7.68 | $8.203 | ▲ 7% |
| South America (Sao Paulo)sa-east-1 | $9.12 | $9.922 | ▲ 9% |
Keep exploring
Each type’s own page, and how it compares with others.
db.r8g.12xlarge
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db.r8i.12xlarge
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AWS RDS PostgreSQL prices in USD. Monthly figures use 730 hours. Prices last updated 12 Nov 2026.