db.r3.xlargevsdb.r4.xlarge

db.r3.xlarge and db.r4.xlarge cost the same on demand in US East (N. Virginia), $0.5 per hour.

At a glancedb.r3.xlargedb.r4.xlarge
On-demand$0.5/hr$0.5/hr
Size4 vCPUs, 30.5 GiB4 vCPUs, 30.5 GiB

Prices in US East (N. Virginia)

“Off” is the discount against each type’s own on-demand price. PostgreSQL, USD per hour.

Optiondb.r3.xlargedb.r4.xlargedb.r4.xlarge vs db.r3.xlarge
On-demandPay by the hour$0.5$0.5Same

Key differences

The biggest lead each one has.

Where db.r3.xlarge leads
Sustained clock2.5 GHz vs 2.3 GHz
9% higher
Where db.r4.xlarge leads
Network peak10 Gbps vs 2.8 Gbps
3.6× higher
EBS baseline bandwidth850 Mbps vs 500 Mbps
70% higher

Specs

12 of 19 specs differ. Those are in bold.

Compute1 of 6 differdb.r3.xlargedb.r4.xlarge
vCPUs44
Physical cores22
Threads per core22
CPU makerIntelIntel
Sustained clock2.5 GHz2.3 GHz
BurstableNoNo
MemoryAll 1 matchdb.r3.xlargedb.r4.xlarge
Memory (GiB)30.530.5
Networking2 of 2 differdb.r3.xlargedb.r4.xlarge
Network baseline0.7 Gbps1.25 Gbps
Network peak2.8 Gbps10 Gbps
Storage7 of 7 differdb.r3.xlargedb.r4.xlarge
Local disks1 × 80 GB SSD–
EBS baseline bandwidth500 Mbps850 Mbps
EBS max bandwidth500 Mbps850 Mbps
EBS baseline throughput62.5 MB/s106.25 MB/s
EBS max throughput62.5 MB/s106.25 MB/s
EBS baseline IOPS4,0006,000
EBS max IOPS4,0006,000
Instance details1 of 2 differdb.r3.xlargedb.r4.xlarge
Familyr3r4
Normalization factor88
Other1 of 1 differdb.r3.xlargedb.r4.xlarge
Hardware Basisr3.xlarger4.xlarge

On-demand prices by region

Cheapest for db.r3.xlarge first. PostgreSQL, USD per hour.

Regiondb.r3.xlargedb.r4.xlargeDifference
US East (N. Virginia)Used in summaryus-east-1$0.5$0.5Same
US East (Ohio)us-east-2$0.5$0.5Same
US West (Oregon)us-west-2$0.5$0.5Same
EU (Ireland)eu-west-1$0.555$0.56▲ 1%
US West (N. California)us-west-1$0.555$0.56▲ 1%
Asia Pacific (Mumbai)ap-south-1$0.569$0.57Same
AWS GovCloud (US-West)us-gov-west-1$0.599$0.602▲ 1%
Asia Pacific (Seoul)ap-northeast-2$0.6$0.6Same
Asia Pacific (Singapore)ap-southeast-1$0.6$0.6Same
Asia Pacific (Sydney)ap-southeast-2$0.6$0.6Same
Asia Pacific (Tokyo)ap-northeast-1$0.6$0.6Same
EU (Frankfurt)eu-central-1$0.6$0.61▲ 2%
Canada (Central)ca-central-1$0.64$0.5405▼ 16%
EU (London)eu-west-2$0.68$0.588▼ 14%

Keep exploring

Each type’s own page, and how it compares with others.

db.r3.xlarger3 family
db.r3.xlarge prices and specsEvery size in the r3 family

Compare db.r3.xlarge with

db.m3.xlarge
db.r4.xlarger4 family
db.r4.xlarge prices and specsEvery size in the r4 family

Compare db.r4.xlarge with

db.m4.xlargedb.r5.xlargedb.r5.xlarge.tpc2.mem2xdb.r5.xlarge.tpc2.mem4x

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AWS RDS PostgreSQL prices in USD. Monthly figures use 730 hours. Prices last updated 12 Nov 2026.