db.r5.4xlargevsdb.r5b.4xlarge.tpc2.mem3x
db.r5.4xlarge is 70% cheaper than db.r5b.4xlarge.tpc2.mem3x on demand in US East (N. Virginia), saving $3,368.95 a month.
| At a glance | db.r5.4xlarge | db.r5b.4xlarge.tpc2.mem3x |
|---|---|---|
| On-demand | $2.00/hr70% less | $6.615/hr |
| Size | 16 vCPUs, 128 GiB | 16 vCPUs, 384 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.r5.4xlarge | db.r5b.4xlarge.tpc2.mem3x | db.r5b.4xlarge.tpc2.mem3x vs db.r5.4xlarge |
|---|---|---|---|
| On-demandPay by the hour | $2.00 | $6.615 | ▲ 231% |
| 1-yr reservedNo upfront | 42% off$1.155 | — | — |
Key differences
The biggest lead each one has.
Where db.r5.4xlarge leads
On-demand price$2.00 vs $6.615 per hour
70% cheaperWhere db.r5b.4xlarge.tpc2.mem3x leads
Memory (GiB)384 vs 128
3× higherSpecs
22 of 25 specs differ. Those are in bold.
| Compute8 of 9 differ | db.r5.4xlarge | db.r5b.4xlarge.tpc2.mem3x |
|---|---|---|
| vCPUs | 16 | 16 |
| Physical cores | 8 | – |
| Threads per core | 2 | – |
| Architecture | – | x86_64 |
| Processor | – | Intel Xeon Platinum 8000 series |
| CPU maker | Intel | – |
| Clock speed | – | Up to 3.1 GHz |
| Sustained clock | 3.1 GHz | – |
| Burstable | No | – |
| Memory1 of 1 differ | db.r5.4xlarge | db.r5b.4xlarge.tpc2.mem3x |
|---|---|---|
| Memory (GiB) | 128 | 384 |
| Networking3 of 3 differ | db.r5.4xlarge | db.r5b.4xlarge.tpc2.mem3x |
|---|---|---|
| Network | – | 10 Gigabit |
| Network baseline | 5 Gbps | – |
| Network peak | 10 Gbps | – |
| Storage6 of 7 differ | db.r5.4xlarge | db.r5b.4xlarge.tpc2.mem3x |
|---|---|---|
| Storage | EBS Only | EBS Only |
| EBS baseline bandwidth | 4,750 Mbps | – |
| EBS max bandwidth | 4,750 Mbps | – |
| EBS baseline throughput | 593.75 MB/s | – |
| EBS max throughput | 593.75 MB/s | – |
| EBS baseline IOPS | 18,750 | – |
| EBS max IOPS | 18,750 | – |
| Instance details3 of 4 differ | db.r5.4xlarge | db.r5b.4xlarge.tpc2.mem3x |
|---|---|---|
| Family | r5 | r5b |
| Category | Memory optimized | Memory optimized |
| Current generation | – | Yes |
| Normalization factor | 32 | 192 |
| Other1 of 1 differ | db.r5.4xlarge | db.r5b.4xlarge.tpc2.mem3x |
|---|---|---|
| Hardware Basis | r5.4xlarge | – |
On-demand prices by region
Cheapest for db.r5.4xlarge first. PostgreSQL, USD per hour.
| Region | db.r5.4xlarge | db.r5b.4xlarge.tpc2.mem3x | Difference |
|---|---|---|---|
| US East (N. Virginia)Used in summaryus-east-1 | $2.00 | $6.615 | ▲ 231% |
| US East (Ohio)us-east-2 | $2.00 | $6.615 | ▲ 231% |
| US West (Oregon)us-west-2 | $2.00 | $6.615 | ▲ 231% |
| EU (Stockholm)eu-north-1 | $2.057 | $7.013 | ▲ 241% |
| Canada (Central)ca-central-1 | $2.162 | $7.237 | ▲ 235% |
| EU (Ireland)eu-west-1 | $2.24 | $7.415 | ▲ 231% |
| EU (London)eu-west-2 | $2.352 | $7.77 | ▲ 230% |
| EU (Milan)eu-south-1 | $2.352 | $7.77 | ▲ 230% |
| Asia Pacific (Seoul)ap-northeast-2 | $2.40 | $7.903 | ▲ 229% |
| Asia Pacific (Singapore)ap-southeast-1 | $2.40 | $7.904 | ▲ 229% |
| Asia Pacific (Sydney)ap-southeast-2 | $2.40 | $8.036 | ▲ 235% |
| Asia Pacific (Tokyo)ap-northeast-1 | $2.40 | $8.037 | ▲ 235% |
| EU (Frankfurt)eu-central-1 | $2.44 | $7.904 | ▲ 224% |
| South America (Sao Paulo)sa-east-1 | $4.188 | $10.523 | ▲ 151% |
Keep exploring
Each type’s own page, and how it compares with others.
db.r5b.4xlarge.tpc2.mem3x
db.r5b.4xlarge.tpc2.mem3x prices and specsEvery size in the r5b familyCompare db.r5b.4xlarge.tpc2.mem3x with
AWS RDS PostgreSQL prices in USD. Monthly figures use 730 hours. Prices last updated 12 Nov 2026.