db.r8a.2xlargevsdb.r8i.2xlarge
db.r8i.2xlarge is 13% cheaper than db.r8a.2xlarge on demand in US East (N. Virginia), saving $115.05 a month.
| At a glance | db.r8a.2xlarge | db.r8i.2xlarge |
|---|---|---|
| On-demand | $1.208/hr | $1.05/hr13% less |
| Lowest rate | $0.9661/hr1-yr savings plan, hourly commitment | $0.84/hr13% less1-yr savings plan, hourly commitment |
| Size | 4 vCPUs, 64 GiB | 4 vCPUs, 64 GiB |
| Processor | 5th Generation AMD EPYC | Intel Xeon Scalable (Granite Rapids) |
| Architecture | x86_64 | 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.r8a.2xlarge | db.r8i.2xlarge | db.r8i.2xlarge vs db.r8a.2xlarge |
|---|---|---|---|
| On-demandPay by the hour | $1.208 | $1.05 | ▼ 13% |
| 1-yr reservedNo upfront | — | 33% off$0.7035 | — |
| 3-yr reservedNo upfront | — | 53% off$0.4935 | — |
| 1-yr savings planHourly commitment | 20% off$0.9661 | 20% off$0.84 | ▼ 13% |
Key differences
The biggest lead each one has.
Where db.r8a.2xlarge leads
Physical cores8 vs 4
2× higherWhere db.r8i.2xlarge leads
On-demand price$1.05 vs $1.208 per hour
13% cheaperSpecs
8 of 23 specs differ. Those are in bold.
| Compute5 of 8 differ | db.r8a.2xlarge | db.r8i.2xlarge |
|---|---|---|
| vCPUs | 4 | 4 |
| Physical cores | 8 | 4 |
| Threads per core | 1 | 2 |
| Architecture | x86_64 | x86_64 |
| Processor | 5th Generation AMD EPYC | Intel Xeon Scalable (Granite Rapids) |
| CPU maker | AMD | Intel |
| Sustained clock | 4.5 GHz | 3.9 GHz |
| Burstable | No | No |
| MemoryAll 1 match | db.r8a.2xlarge | db.r8i.2xlarge |
|---|---|---|
| Memory (GiB) | 64 | 64 |
| Networking1 of 3 differ | db.r8a.2xlarge | db.r8i.2xlarge |
|---|---|---|
| Network | Up to 15000 Mbps | Up to 15000 Megabit |
| Network baseline | 3.75 Gbps | 3.75 Gbps |
| Network peak | 15 Gbps | 15 Gbps |
| StorageAll 7 match | db.r8a.2xlarge | db.r8i.2xlarge |
|---|---|---|
| Storage | EBS Only | EBS Only |
| EBS baseline bandwidth | 2,500 Mbps | 2,500 Mbps |
| EBS max bandwidth | 10,000 Mbps | 10,000 Mbps |
| EBS baseline throughput | 312.5 MB/s | 312.5 MB/s |
| EBS max throughput | 1,250 MB/s | 1,250 MB/s |
| EBS baseline IOPS | 12,000 | 12,000 |
| EBS max IOPS | 40,000 | 40,000 |
| Instance details1 of 3 differ | db.r8a.2xlarge | db.r8i.2xlarge |
|---|---|---|
| Family | r8a | r8i |
| Category | Memory optimized | Memory optimized |
| Current generation | Yes | Yes |
| Other1 of 1 differ | db.r8a.2xlarge | db.r8i.2xlarge |
|---|---|---|
| Hardware Basis | r8a.2xlarge | r8i.2xlarge |
On-demand prices by region
Cheapest for db.r8a.2xlarge first. PostgreSQL, USD per hour.
| Region | db.r8a.2xlarge | db.r8i.2xlarge | Difference |
|---|---|---|---|
| US East (N. Virginia)Used in summaryus-east-1 | $1.208 | $1.05 | ▼ 13% |
| US East (Ohio)us-east-2 | $1.208 | $1.05 | ▼ 13% |
| US West (Oregon)us-west-2 | $1.208 | $1.05 | ▼ 13% |
| Canada (Central)ca-central-1 | $1.304 | $1.13 | ▼ 13% |
| EU (Ireland)eu-west-1 | $1.352 | $1.18 | ▼ 13% |
| Europe (Spain)eu-south-2 | $1.352 | $1.18 | ▼ 13% |
| Asia Pacific (Tokyo)ap-northeast-1 | $1.449 | $1.26 | ▼ 13% |
| EU (Frankfurt)eu-central-1 | $1.473 | $1.28 | ▼ 13% |
Keep exploring
Each type’s own page, and how it compares with others.
db.r8a.2xlarge
db.r8a.2xlarge prices and specsEvery size in the r8a familyCompare db.r8a.2xlarge with
db.r8i.2xlarge
db.r8i.2xlarge prices and specsEvery size in the r8i familyCompare db.r8i.2xlarge with
AWS RDS PostgreSQL prices in USD. Monthly figures use 730 hours. Prices last updated 12 Nov 2026.