db.r8a.xlargevsdb.r8g.xlarge
db.r8g.xlarge is 21% cheaper than db.r8a.xlarge on demand in US East (N. Virginia), saving $91.83 a month.
| At a glance | db.r8a.xlarge | db.r8g.xlarge |
|---|---|---|
| On-demand | $0.6038/hr | $0.478/hr21% less |
| Lowest rate | $0.483/hr1-yr savings plan, hourly commitment | $0.3824/hr21% less1-yr savings plan, hourly commitment |
| Size | 4 vCPUs, 32 GiB | 4 vCPUs, 32 GiB |
Prices in US East (N. Virginia)
“Off” is the discount against each type’s own on-demand price. PostgreSQL, USD per hour.
| Option | db.r8a.xlarge | db.r8g.xlarge | db.r8g.xlarge vs db.r8a.xlarge |
|---|---|---|---|
| On-demandPay by the hour | $0.6038 | $0.478 | ▼ 21% |
| 1-yr reservedNo upfront | — | 33% off$0.32 | — |
| 3-yr reservedNo upfront | — | 53% off$0.2246 | — |
| 1-yr savings planHourly commitment | 20% off$0.483 | 20% off$0.3824 | ▼ 21% |
Key differences
The biggest lead each one has.
Where db.r8a.xlarge leads
Sustained clock4.5 GHz vs 2.8 GHz
61% higherWhere db.r8g.xlarge leads
On-demand price$0.478 vs $0.6038 per hour
21% cheaperSpecs
6 of 19 specs differ. Those are in bold.
| Compute3 of 7 differ | db.r8a.xlarge | db.r8g.xlarge |
|---|---|---|
| vCPUs | 4 | 4 |
| Physical cores | 4 | 4 |
| Threads per core | 1 | 1 |
| Architecture | – | arm64 |
| CPU maker | AMD | AWS |
| Sustained clock | 4.5 GHz | 2.8 GHz |
| Burstable | No | No |
| MemoryAll 1 match | db.r8a.xlarge | db.r8g.xlarge |
|---|---|---|
| Memory (GiB) | 32 | 32 |
| NetworkingAll 2 match | db.r8a.xlarge | db.r8g.xlarge |
|---|---|---|
| Network baseline | 1.875 Gbps | 1.875 Gbps |
| Network peak | 12.5 Gbps | 12.5 Gbps |
| StorageAll 6 match | db.r8a.xlarge | db.r8g.xlarge |
|---|---|---|
| EBS baseline bandwidth | 1,250 Mbps | 1,250 Mbps |
| EBS max bandwidth | 10,000 Mbps | 10,000 Mbps |
| EBS baseline throughput | 156.25 MB/s | 156.25 MB/s |
| EBS max throughput | 1,250 MB/s | 1,250 MB/s |
| EBS baseline IOPS | 6,000 | 6,000 |
| EBS max IOPS | 40,000 | 40,000 |
| Instance details2 of 2 differ | db.r8a.xlarge | db.r8g.xlarge |
|---|---|---|
| Family | r8a | r8g |
| Normalization factor | – | 8 |
| Other1 of 1 differ | db.r8a.xlarge | db.r8g.xlarge |
|---|---|---|
| Hardware Basis | r8a.xlarge | r8g.xlarge |
On-demand prices by region
Cheapest for db.r8a.xlarge first. PostgreSQL, USD per hour.
| Region | db.r8a.xlarge | db.r8g.xlarge | Difference |
|---|---|---|---|
| US East (N. Virginia)Used in summaryus-east-1 | $0.6038 | $0.478 | ▼ 21% |
| US East (Ohio)us-east-2 | $0.6038 | $0.478 | ▼ 21% |
| US West (Oregon)us-west-2 | $0.6038 | $0.478 | ▼ 21% |
| Canada (Central)ca-central-1 | $0.652 | $0.516 | ▼ 21% |
| EU (Ireland)eu-west-1 | $0.6762 | $0.536 | ▼ 21% |
| Europe (Spain)eu-south-2 | $0.6762 | $0.536 | ▼ 21% |
| Asia Pacific (Tokyo)ap-northeast-1 | $0.7246 | $0.574 | ▼ 21% |
| EU (Frankfurt)eu-central-1 | $0.7366 | $0.582 | ▼ 21% |
Keep exploring
Each type’s own page, and how it compares with others.
AWS RDS PostgreSQL prices in USD. Monthly figures use 730 hours. Prices last updated 12 Nov 2026.