db.r3.8xlargevsdb.r4.8xlarge
db.r3.8xlarge is 1% cheaper than db.r4.8xlarge on demand in US East (N. Virginia), saving $14.60 a month.
| At a glance | db.r3.8xlarge | db.r4.8xlarge |
|---|---|---|
| On-demand | $3.98/hr1% less | $4.00/hr |
| Size | 32 vCPUs, 244 GiB | 32 vCPUs, 244 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.r3.8xlarge | db.r4.8xlarge | db.r4.8xlarge vs db.r3.8xlarge |
|---|---|---|---|
| On-demandPay by the hour | $3.98 | $4.00 | ▲ 1% |
Key differences
The biggest lead each one has.
Where db.r3.8xlarge leads
On-demand price$3.98 vs $4.00 per hour
1% cheaperSustained clock2.5 GHz vs 2.3 GHz
9% higherWhere db.r4.8xlarge leads
Network baseline12 Gbps vs 5 Gbps
2.4× higherSpecs
22 of 28 specs differ. Those are in bold.
| Compute5 of 10 differ | db.r3.8xlarge | db.r4.8xlarge |
|---|---|---|
| vCPUs | 32 | 32 |
| Physical cores | 16 | 16 |
| Threads per core | 2 | 2 |
| Architecture | – | x86_64 |
| Processor | – | Intel Xeon E5-2686 v4 (Broadwell) |
| CPU maker | Intel | Intel |
| Clock speed | – | 2.3 GHz |
| Sustained clock | 2.5 GHz | 2.3 GHz |
| Processor features | – | Intel AVX, Intel AVX2, Intel Turbo |
| Burstable | No | No |
| MemoryAll 1 match | db.r3.8xlarge | db.r4.8xlarge |
|---|---|---|
| Memory (GiB) | 244 | 244 |
| Networking3 of 3 differ | db.r3.8xlarge | db.r4.8xlarge |
|---|---|---|
| Network | – | 10 Gigabit |
| Network baseline | 5 Gbps | 12 Gbps |
| Network peak | 10 Gbps | 12 Gbps |
| Storage9 of 9 differ | db.r3.8xlarge | db.r4.8xlarge |
|---|---|---|
| Storage | – | EBS Only |
| Local disks | 2 × 320 GB SSD | – |
| EBS throughput | – | 6000 Mbps |
| EBS baseline bandwidth | – | 7,000 Mbps |
| EBS max bandwidth | – | 7,000 Mbps |
| EBS baseline throughput | – | 875 MB/s |
| EBS max throughput | – | 875 MB/s |
| EBS baseline IOPS | – | 37,500 |
| EBS max IOPS | – | 37,500 |
| Instance details4 of 4 differ | db.r3.8xlarge | db.r4.8xlarge |
|---|---|---|
| Family | r3 | r4 |
| Category | – | Memory optimized |
| Current generation | – | No |
| Normalization factor | 64 | 128 |
| Other1 of 1 differ | db.r3.8xlarge | db.r4.8xlarge |
|---|---|---|
| Hardware Basis | r3.8xlarge | r4.8xlarge |
On-demand prices by region
Cheapest for db.r3.8xlarge first. PostgreSQL, USD per hour.
| Region | db.r3.8xlarge | db.r4.8xlarge | Difference |
|---|---|---|---|
| US East (N. Virginia)Used in summaryus-east-1 | $3.98 | $4.00 | ▲ 1% |
| US East (Ohio)us-east-2 | $3.98 | $4.00 | ▲ 1% |
| US West (Oregon)us-west-2 | $3.98 | $4.00 | ▲ 1% |
| EU (Ireland)eu-west-1 | $4.435 | $4.48 | ▲ 1% |
| US West (N. California)us-west-1 | $4.435 | $4.48 | ▲ 1% |
| Asia Pacific (Mumbai)ap-south-1 | $4.535 | $4.56 | ▲ 1% |
| Asia Pacific (Seoul)ap-northeast-2 | $4.775 | $4.80 | ▲ 1% |
| Asia Pacific (Singapore)ap-southeast-1 | $4.775 | $4.80 | ▲ 1% |
| Asia Pacific (Sydney)ap-southeast-2 | $4.775 | $4.80 | ▲ 1% |
| Asia Pacific (Tokyo)ap-northeast-1 | $4.775 | $4.80 | ▲ 1% |
| AWS GovCloud (US-West)us-gov-west-1 | $4.776 | $4.816 | ▲ 1% |
| EU (Frankfurt)eu-central-1 | $4.79 | $4.88 | ▲ 2% |
| Canada (Central)ca-central-1 | $5.12 | $4.324 | ▼ 16% |
| EU (London)eu-west-2 | $5.44 | $4.704 | ▼ 14% |
| South America (Sao Paulo)sa-east-1 | $8.375 | $8.376 | Same |
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.