db.r8a.24xlargevsdb.r8i.24xlarge
db.r8i.24xlarge is 13% cheaper than db.r8a.24xlarge on demand in US East (N. Virginia), saving $1,380.58 a month.
| At a glance | db.r8a.24xlarge | db.r8i.24xlarge |
|---|---|---|
| On-demand | $14.491/hr | $12.60/hr13% less |
| Lowest rate | $11.593/hr1-yr savings plan, hourly commitment | $10.08/hr13% less1-yr savings plan, hourly commitment |
| Size | 96 vCPUs, 768 GiB | 96 vCPUs, 768 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.24xlarge | db.r8i.24xlarge | db.r8i.24xlarge vs db.r8a.24xlarge |
|---|---|---|---|
| On-demandPay by the hour | $14.491 | $12.60 | ▼ 13% |
| 1-yr reservedNo upfront | — | 33% off$8.442 | — |
| 3-yr reservedNo upfront | — | 53% off$5.922 | — |
| 1-yr savings planHourly commitment | 20% off$11.593 | 20% off$10.08 | ▼ 13% |
Key differences
The biggest lead each one has.
Where db.r8a.24xlarge leads
Physical cores96 vs 48
2× higherWhere db.r8i.24xlarge leads
On-demand price$12.60 vs $14.491 per hour
13% cheaperSpecs
16 of 27 specs differ. Those are in bold.
| Compute8 of 10 differ | db.r8a.24xlarge | db.r8i.24xlarge |
|---|---|---|
| vCPUs | 96 | 96 |
| Physical cores | 96 | 48 |
| Threads per core | 1 | 2 |
| Architecture | x86_64 | – |
| Processor | AMD EPYC 9R45 Processor | – |
| CPU maker | AMD | Intel |
| Clock speed | Up to 4.5 GHz | – |
| Sustained clock | 4.5 GHz | 3.9 GHz |
| Processor features | AMD Turbo; AVX; AVX2; AVX512 | – |
| Burstable | No | No |
| MemoryAll 1 match | db.r8a.24xlarge | db.r8i.24xlarge |
|---|---|---|
| Memory (GiB) | 768 | 768 |
| Networking1 of 3 differ | db.r8a.24xlarge | db.r8i.24xlarge |
|---|---|---|
| Network | 40000 Megabit | – |
| Network baseline | 40 Gbps | 40 Gbps |
| Network peak | 40 Gbps | 40 Gbps |
| Storage2 of 8 differ | db.r8a.24xlarge | db.r8i.24xlarge |
|---|---|---|
| Storage | Aurora IO Optimization Mode | – |
| EBS throughput | 30000 Mbps | – |
| EBS baseline bandwidth | 30,000 Mbps | 30,000 Mbps |
| EBS max bandwidth | 30,000 Mbps | 30,000 Mbps |
| EBS baseline throughput | 3,750 MB/s | 3,750 MB/s |
| EBS max throughput | 3,750 MB/s | 3,750 MB/s |
| EBS baseline IOPS | 120,000 | 120,000 |
| EBS max IOPS | 120,000 | 120,000 |
| Instance details4 of 4 differ | db.r8a.24xlarge | db.r8i.24xlarge |
|---|---|---|
| Family | r8a | r8i |
| Category | Memory optimized | – |
| Current generation | Yes | – |
| Normalization factor | 249.6 | – |
| Other1 of 1 differ | db.r8a.24xlarge | db.r8i.24xlarge |
|---|---|---|
| Hardware Basis | r8a.24xlarge | r8i.24xlarge |
On-demand prices by region
Cheapest for db.r8a.24xlarge first. PostgreSQL, USD per hour.
| Region | db.r8a.24xlarge | db.r8i.24xlarge | Difference |
|---|---|---|---|
| US East (N. Virginia)Used in summaryus-east-1 | $14.491 | $12.60 | ▼ 13% |
| US East (Ohio)us-east-2 | $14.491 | $12.60 | ▼ 13% |
| US West (Oregon)us-west-2 | $14.491 | $12.60 | ▼ 13% |
| Canada (Central)ca-central-1 | $15.648 | $13.61 | ▼ 13% |
| EU (Ireland)eu-west-1 | $16.229 | $14.11 | ▼ 13% |
| Europe (Spain)eu-south-2 | $16.229 | $14.11 | ▼ 13% |
| Asia Pacific (Tokyo)ap-northeast-1 | $17.39 | $15.12 | ▼ 13% |
| EU (Frankfurt)eu-central-1 | $17.678 | $15.37 | ▼ 13% |
Keep exploring
Each type’s own page, and how it compares with others.
db.r8a.24xlarge
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db.r8i.24xlarge
db.r8i.24xlarge prices and specsEvery size in the r8i familyCompare db.r8i.24xlarge with
AWS RDS PostgreSQL prices in USD. Monthly figures use 730 hours. Prices last updated 12 Nov 2026.