db.r5.2xlargevsdb.r5b.2xlarge
db.r5.2xlarge is 16% cheaper than db.r5b.2xlarge on demand in US East (N. Virginia), saving $134.32 a month.
| At a glance | db.r5.2xlarge | db.r5b.2xlarge |
|---|---|---|
| On-demand | $1.00/hr16% less | $1.184/hr |
| Lowest rate | $0.5775/hr16% less1-yr reserved, no upfront | $0.6858/hr1-yr reserved, no upfront |
| Size | 8 vCPUs, 64 GiB | 8 vCPUs, 64 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.r5.2xlarge | db.r5b.2xlarge | db.r5b.2xlarge vs db.r5.2xlarge |
|---|---|---|---|
| On-demandPay by the hour | $1.00 | $1.184 | ▲ 18% |
| 1-yr reservedNo upfront | 42% off$0.5775 | 42% off$0.6858 | ▲ 19% |
Key differences
The biggest lead each one has.
Where db.r5.2xlarge leads
On-demand price$1.00 vs $1.184 per hour
16% cheaperWhere db.r5b.2xlarge leads
EBS max IOPS43,333 vs 18,750
2.3× higherSpecs
11 of 20 specs differ. Those are in bold.
| ComputeAll 6 match | db.r5.2xlarge | db.r5b.2xlarge |
|---|---|---|
| vCPUs | 8 | 8 |
| Physical cores | 4 | 4 |
| Threads per core | 2 | 2 |
| CPU maker | Intel | Intel |
| Sustained clock | 3.1 GHz | 3.1 GHz |
| Burstable | No | No |
| MemoryAll 1 match | db.r5.2xlarge | db.r5b.2xlarge |
|---|---|---|
| Memory (GiB) | 64 | 64 |
| NetworkingAll 2 match | db.r5.2xlarge | db.r5b.2xlarge |
|---|---|---|
| Network baseline | 2.5 Gbps | 2.5 Gbps |
| Network peak | 10 Gbps | 10 Gbps |
| Storage7 of 7 differ | db.r5.2xlarge | db.r5b.2xlarge |
|---|---|---|
| Storage | – | EBS Only |
| EBS baseline bandwidth | 2,300 Mbps | 5,000 Mbps |
| EBS max bandwidth | 4,750 Mbps | 10,000 Mbps |
| EBS baseline throughput | 287.5 MB/s | 625 MB/s |
| EBS max throughput | 593.75 MB/s | 1,250 MB/s |
| EBS baseline IOPS | 12,000 | 21,667 |
| EBS max IOPS | 18,750 | 43,333 |
| Instance details3 of 3 differ | db.r5.2xlarge | db.r5b.2xlarge |
|---|---|---|
| Family | r5 | r5b |
| Category | – | Memory optimized |
| Normalization factor | 16 | – |
| Other1 of 1 differ | db.r5.2xlarge | db.r5b.2xlarge |
|---|---|---|
| Hardware Basis | r5.2xlarge | r5b.2xlarge |
On-demand prices by region
Cheapest for db.r5.2xlarge first. PostgreSQL, USD per hour.
| Region | db.r5.2xlarge | db.r5b.2xlarge | Difference |
|---|---|---|---|
| US East (N. Virginia)Used in summaryus-east-1 | $1.00 | $1.184 | ▲ 18% |
| US East (Ohio)us-east-2 | $1.00 | $1.184 | ▲ 18% |
| US West (Oregon)us-west-2 | $1.00 | $1.184 | ▲ 18% |
| EU (Stockholm)eu-north-1 | $1.028 | $1.169 | ▲ 14% |
| Canada (Central)ca-central-1 | $1.081 | $1.206 | ▲ 12% |
| EU (Ireland)eu-west-1 | $1.12 | $1.236 | ▲ 10% |
| EU (London)eu-west-2 | $1.176 | $1.295 | ▲ 10% |
| EU (Milan)eu-south-1 | $1.176 | $1.295 | ▲ 10% |
| Asia Pacific (Seoul)ap-northeast-2 | $1.20 | $1.317 | ▲ 10% |
| Asia Pacific (Singapore)ap-southeast-1 | $1.20 | $1.404 | ▲ 17% |
| Asia Pacific (Sydney)ap-southeast-2 | $1.20 | $1.339 | ▲ 12% |
| Asia Pacific (Tokyo)ap-northeast-1 | $1.20 | $1.428 | ▲ 19% |
| EU (Frankfurt)eu-central-1 | $1.22 | $1.429 | ▲ 17% |
| South America (Sao Paulo)sa-east-1 | $2.094 | $1.754 | ▼ 16% |
Keep exploring
Each type’s own page, and how it compares with others.
db.r5b.2xlarge
db.r5b.2xlarge prices and specsEvery size in the r5b familyCompare db.r5b.2xlarge with
AWS RDS PostgreSQL prices in USD. Monthly figures use 730 hours. Prices last updated 12 Nov 2026.