db.r5.4xlargevsdb.r6i.4xlarge

db.r5.4xlarge and db.r6i.4xlarge cost the same on demand in US East (N. Virginia), $2.00 per hour.

At a glancedb.r5.4xlargedb.r6i.4xlarge
On-demand$2.00/hr$2.00/hr
Lowest rate$1.155/hr0% less1-yr reserved, no upfront$1.155/hr1-yr reserved, no upfront
Size16 vCPUs, 128 GiB16 vCPUs, 128 GiB

Prices in US East (N. Virginia)

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

Optiondb.r5.4xlargedb.r6i.4xlargedb.r6i.4xlarge vs db.r5.4xlarge
On-demandPay by the hour$2.00$2.00Same
1-yr reservedNo upfront42% off$1.15542% off$1.155Same

Key differences

The biggest lead each one has.

Where db.r5.4xlarge leads

No clear lead on the measures we compare.

Where db.r6i.4xlarge leads
EBS max IOPS40,000 vs 18,750
2.1× higher
Network baseline6.25 Gbps vs 5 Gbps
25% higher
Sustained clock3.5 GHz vs 3.1 GHz
13% higher

Specs

13 of 20 specs differ. Those are in bold.

Compute1 of 6 differdb.r5.4xlargedb.r6i.4xlarge
vCPUs1616
Physical cores88
Threads per core22
CPU makerIntelIntel
Sustained clock3.1 GHz3.5 GHz
BurstableNoNo
MemoryAll 1 matchdb.r5.4xlargedb.r6i.4xlarge
Memory (GiB)128128
Networking2 of 2 differdb.r5.4xlargedb.r6i.4xlarge
Network baseline5 Gbps6.25 Gbps
Network peak10 Gbps12.5 Gbps
Storage7 of 7 differdb.r5.4xlargedb.r6i.4xlarge
StorageEBS Only–
EBS baseline bandwidth4,750 Mbps5,000 Mbps
EBS max bandwidth4,750 Mbps10,000 Mbps
EBS baseline throughput593.75 MB/s625 MB/s
EBS max throughput593.75 MB/s1,250 MB/s
EBS baseline IOPS18,75020,000
EBS max IOPS18,75040,000
Instance details2 of 3 differdb.r5.4xlargedb.r6i.4xlarge
Familyr5r6i
CategoryMemory optimized–
Normalization factor3232
Other1 of 1 differdb.r5.4xlargedb.r6i.4xlarge
Hardware Basisr5.4xlarger6i.4xlarge

On-demand prices by region

Cheapest for db.r5.4xlarge first. PostgreSQL, USD per hour.

Regiondb.r5.4xlargedb.r6i.4xlargeDifference
US East (N. Virginia)Used in summaryus-east-1$2.00$2.00Same
US East (Ohio)us-east-2$2.00$2.00Same
US West (Oregon)us-west-2$2.00$2.00Same
EU (Stockholm)eu-north-1$2.057$2.056Same
Canada (Central)ca-central-1$2.162$2.162Same
EU (Ireland)eu-west-1$2.24$2.24Same
Europe (Spain)eu-south-2$2.24$3.328▲ 49%
US West (N. California)us-west-1$2.24$2.24Same
Asia Pacific (Hyderabad)ap-south-2$2.28$3.432▲ 51%
Asia Pacific (Mumbai)ap-south-1$2.28$2.28Same
Israel (Tel Aviv)il-central-1$2.35$2.35Same
EU (London)eu-west-2$2.352$2.352Same
EU (Milan)eu-south-1$2.352$2.352Same
EU (Paris)eu-west-3$2.352$2.352Same
Asia Pacific (Jakarta)ap-southeast-3$2.40$3.64▲ 52%
Asia Pacific (Melbourne)ap-southeast-4$2.40$3.64▲ 52%
Asia Pacific (Osaka)ap-northeast-3$2.40$2.40Same
Asia Pacific (Seoul)ap-northeast-2$2.40$2.40Same
Asia Pacific (Singapore)ap-southeast-1$2.40$2.40Same
Asia Pacific (Sydney)ap-southeast-2$2.40$2.40Same
Asia Pacific (Tokyo)ap-northeast-1$2.40$2.40Same
AWS GovCloud (US-East)us-gov-east-1$2.41$2.80▲ 16%
AWS GovCloud (US-West)us-gov-west-1$2.41$2.80▲ 16%
EU (Frankfurt)eu-central-1$2.44$2.44Same
Middle East (Bahrain)me-south-1$2.464$2.464Same
Middle East (UAE)me-central-1$2.464$3.661▲ 49%
Canada West (Calgary)ca-west-1$2.56$2.162▼ 16%
Asia Pacific (Hong Kong)ap-east-1$2.64$2.64Same
Africa (Cape Town)af-south-1$2.666$2.664Same
Europe (Zurich)eu-central-2$2.688$4.004▲ 49%
South America (Sao Paulo)sa-east-1$4.188$4.192Same

Keep exploring

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

db.r5.4xlargeMemory optimized, r5 family
db.r5.4xlarge prices and specsEvery size in the r5 family

Compare db.r5.4xlarge with

db.m5.4xlargedb.r5d.4xlargedb.r5b.4xlargedb.r5b.4xlarge.tpc2.mem2xdb.r5b.4xlarge.tpc2.mem3xdb.r5b.4xlarge.tpc2.mem4xdb.r4.4xlargedb.r6i.4xlarge.tpc2.mem2xdb.r6i.4xlarge.tpc2.mem3xdb.r6i.4xlarge.tpc2.mem4xdb.r6i.4xlarge.tpc2.mem8x
db.r6i.4xlarger6i family
db.r6i.4xlarge prices and specsEvery size in the r6i family

Compare db.r6i.4xlarge with

db.m6i.4xlargedb.r6g.4xlargedb.r6id.4xlargedb.r6idn.4xlargedb.r6in.4xlargedb.r5.4xlarge.tpc2.mem2xdb.r5.4xlarge.tpc2.mem3xdb.r5.4xlarge.tpc2.mem4xdb.r7i.4xlargedb.r7i.4xlarge.tpc2.mem2xdb.r7i.4xlarge.tpc2.mem3xdb.r7i.4xlarge.tpc2.mem4x

Pay the committed rate, with commitment protection

The best committed rate on these two is 42% below on-demand. Connect your cloud accounts to unlock greater savings with commitment protection.

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