db.r7g.8xlargevsdb.r7i.8xlarge
db.r7g.8xlarge is 4% cheaper than db.r7i.8xlarge on demand in US East (N. Virginia), saving $127.75 a month. 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.r7g.8xlarge | db.r7i.8xlarge |
|---|---|---|
| On-demand | $3.825/hr4% less | $4.00/hr |
| Lowest rate | $2.945/hr1-yr reserved, no upfront | $2.68/hr9% less1-yr reserved, no upfront |
| Size | 32 vCPUs, 256 GiB | 32 vCPUs, 256 GiB |
| Processor | AWS Graviton3 | Intel Xeon Scalable (Sapphire Rapids 8488C) |
| 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.r7g.8xlarge | db.r7i.8xlarge | db.r7i.8xlarge vs db.r7g.8xlarge |
|---|---|---|---|
| On-demandPay by the hour | $3.825 | $4.00 | ▲ 5% |
| 1-yr reservedNo upfront | 23% off$2.945 | 33% off$2.68 | ▼ 9% |
| 1-yr savings planHourly commitment | 20% off$3.06 | 20% off$3.20 | ▲ 5% |
Key differences
The biggest lead each one has.
Where db.r7g.8xlarge leads
On-demand price$3.825 vs $4.00 per hour
4% cheaperPhysical cores32 vs 16
2× higherNetwork baseline15 Gbps vs 12.5 Gbps
20% higherWhere db.r7i.8xlarge leads
Sustained clock3.2 GHz vs 2.6 GHz
23% higherSpecs
13 of 24 specs differ. Those are in bold.
| Compute6 of 8 differ | db.r7g.8xlarge | db.r7i.8xlarge |
|---|---|---|
| vCPUs | 32 | 32 |
| Physical cores | 32 | 16 |
| Threads per core | 1 | 2 |
| Architecture | arm64 | x86_64 |
| Processor | AWS Graviton3 | Intel Xeon Scalable (Sapphire Rapids 8488C) |
| CPU maker | AWS | Intel |
| Sustained clock | 2.6 GHz | 3.2 GHz |
| Burstable | No | No |
| MemoryAll 1 match | db.r7g.8xlarge | db.r7i.8xlarge |
|---|---|---|
| Memory (GiB) | 256 | 256 |
| Networking3 of 3 differ | db.r7g.8xlarge | db.r7i.8xlarge |
|---|---|---|
| Network | 15 Gigabit | 12.5 Gbps |
| Network baseline | 15 Gbps | 12.5 Gbps |
| Network peak | 15 Gbps | 12.5 Gbps |
| Storage1 of 7 differ | db.r7g.8xlarge | db.r7i.8xlarge |
|---|---|---|
| Storage | EBS Only | Aurora IO Optimization Mode |
| EBS baseline bandwidth | 10,000 Mbps | 10,000 Mbps |
| EBS max bandwidth | 10,000 Mbps | 10,000 Mbps |
| EBS baseline throughput | 1,250 MB/s | 1,250 MB/s |
| EBS max throughput | 1,250 MB/s | 1,250 MB/s |
| EBS baseline IOPS | 40,000 | 40,000 |
| EBS max IOPS | 40,000 | 40,000 |
| Instance details2 of 4 differ | db.r7g.8xlarge | db.r7i.8xlarge |
|---|---|---|
| Family | r7g | r7i |
| Category | Memory optimized | Memory optimized |
| Current generation | Yes | Yes |
| Normalization factor | 128 | 83.2 |
| Other1 of 1 differ | db.r7g.8xlarge | db.r7i.8xlarge |
|---|---|---|
| Hardware Basis | r7g.8xlarge | r7i.8xlarge |
On-demand prices by region
Cheapest for db.r7g.8xlarge first. PostgreSQL, USD per hour.
| Region | db.r7g.8xlarge | db.r7i.8xlarge | Difference |
|---|---|---|---|
| US East (N. Virginia)Used in summaryus-east-1 | $3.825 | $4.00 | ▲ 5% |
| US East (Ohio)us-east-2 | $3.825 | $4.00 | ▲ 5% |
| US West (Oregon)us-west-2 | $3.825 | $4.00 | ▲ 5% |
| Asia Pacific (Malaysia)ap-southeast-5 | $3.904 | $4.08 | ▲ 5% |
| Asia Pacific (Thailand)ap-southeast-7 | $3.904 | $4.752 | ▲ 22% |
| EU (Stockholm)eu-north-1 | $3.926 | $4.112 | ▲ 5% |
| Mexico (Central)mx-central-1 | $4.016 | $4.208 | ▲ 5% |
| Asia Pacific (Taipei)ap-east-2 | $4.128 | $4.32 | ▲ 5% |
| Canada (Central)ca-central-1 | $4.131 | $4.32 | ▲ 5% |
| Europe (Spain)eu-south-2 | $4.285 | $4.48 | ▲ 5% |
| US West (N. California)us-west-1 | $4.285 | $4.48 | ▲ 5% |
| EU (Ireland)eu-west-1 | $4.286 | $4.48 | ▲ 5% |
| Asia Pacific (Hyderabad)ap-south-2 | $4.352 | $5.28 | ▲ 21% |
| Asia Pacific (Mumbai)ap-south-1 | $4.352 | $4.56 | ▲ 5% |
| EU (London)eu-west-2 | $4.488 | $4.704 | ▲ 5% |
| EU (Milan)eu-south-1 | $4.488 | $4.704 | ▲ 5% |
| Asia Pacific (Singapore)ap-southeast-1 | $4.59 | $4.80 | ▲ 5% |
| Asia Pacific (Sydney)ap-southeast-2 | $4.59 | $4.80 | ▲ 5% |
| Asia Pacific (Tokyo)ap-northeast-1 | $4.59 | $4.80 | ▲ 5% |
| Asia Pacific (Seoul)ap-northeast-2 | $4.59 | $4.80 | ▲ 5% |
| Asia Pacific (Jakarta)ap-southeast-3 | $4.592 | $4.80 | ▲ 5% |
| Asia Pacific (Osaka)ap-northeast-3 | $4.592 | $5.60 | ▲ 22% |
| AWS GovCloud (US-East)us-gov-east-1 | $4.592 | $4.80 | ▲ 5% |
| AWS GovCloud (US-West)us-gov-west-1 | $4.592 | $4.80 | ▲ 5% |
| EU (Frankfurt)eu-central-1 | $4.658 | $4.88 | ▲ 5% |
| Asia Pacific (New Zealand)ap-southeast-6 | $4.822 | $5.04 | ▲ 5% |
| EU (Paris)eu-west-3 | $5.088 | $4.704 | ▼ 8% |
| South America (Sao Paulo)sa-east-1 | $6.082 | $6.36 | ▲ 5% |
Keep exploring
Each type’s own page, and how it compares with others.
db.r7g.8xlarge
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db.r7i.8xlarge
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AWS RDS PostgreSQL prices in USD. Monthly figures use 730 hours. Prices last updated 12 Nov 2026.