db.r5.4xlargevsdb.r6i.4xlarge.tpc2.mem4x

db.r5.4xlarge is 73% cheaper than db.r6i.4xlarge.tpc2.mem4x on demand in US East (N. Virginia), saving $3,982.88 a month.

At a glancedb.r5.4xlargedb.r6i.4xlarge.tpc2.mem4x
On-demand$2.00/hr73% less$7.456/hr
Lowest rate$1.155/hr78% less1-yr reserved, no upfront$5.368/hr1-yr reserved, no upfront
Size16 vCPUs, 128 GiB16 vCPUs, 512 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.4xlarge.tpc2.mem4xdb.r6i.4xlarge.tpc2.mem4x vs db.r5.4xlarge
On-demandPay by the hour$2.00$7.456▲ 273%
1-yr reservedNo upfront42% off$1.15528% off$5.368▲ 365%

Key differences

The biggest lead each one has.

Where db.r5.4xlarge leads
On-demand price$2.00 vs $7.456 per hour
73% cheaper
Where db.r6i.4xlarge.tpc2.mem4x leads
Memory (GiB)512 vs 128
4× higher

Specs

21 of 24 specs differ. Those are in bold.

Compute7 of 8 differdb.r5.4xlargedb.r6i.4xlarge.tpc2.mem4x
vCPUs1616
Physical cores8–
Threads per core2–
Architecture–x86_64
Processor–Intel Xeon Scalable Ice Lake
CPU makerIntel–
Sustained clock3.1 GHz–
BurstableNo–
Memory1 of 1 differdb.r5.4xlargedb.r6i.4xlarge.tpc2.mem4x
Memory (GiB)128512
Networking3 of 3 differdb.r5.4xlargedb.r6i.4xlarge.tpc2.mem4x
Network–25 Gbps
Network baseline5 Gbps–
Network peak10 Gbps–
Storage6 of 7 differdb.r5.4xlargedb.r6i.4xlarge.tpc2.mem4x
StorageEBS OnlyEBS Only
EBS baseline bandwidth4,750 Mbps–
EBS max bandwidth4,750 Mbps–
EBS baseline throughput593.75 MB/s–
EBS max throughput593.75 MB/s–
EBS baseline IOPS18,750–
EBS max IOPS18,750–
Instance details3 of 4 differdb.r5.4xlargedb.r6i.4xlarge.tpc2.mem4x
Familyr5r6i
CategoryMemory optimizedMemory optimized
Current generation–Yes
Normalization factor32256
Other1 of 1 differdb.r5.4xlargedb.r6i.4xlarge.tpc2.mem4x
Hardware Basisr5.4xlarge–

On-demand prices by region

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

Regiondb.r5.4xlargedb.r6i.4xlarge.tpc2.mem4xDifference
US East (N. Virginia)Used in summaryus-east-1$2.00$7.456▲ 273%
US East (Ohio)us-east-2$2.00$7.456▲ 273%
US West (Oregon)us-west-2$2.00$7.456▲ 273%
EU (Stockholm)eu-north-1$2.057$7.84▲ 281%
Canada (Central)ca-central-1$2.162$8.192▲ 279%
EU (Ireland)eu-west-1$2.24$8.256▲ 269%
Europe (Spain)eu-south-2$2.24$8.256▲ 269%
US West (N. California)us-west-1$2.24$8.224▲ 267%
Asia Pacific (Hyderabad)ap-south-2$2.28$8.416▲ 269%
Asia Pacific (Mumbai)ap-south-1$2.28$8.416▲ 269%
Israel (Tel Aviv)il-central-1$2.35$8.669▲ 269%
EU (London)eu-west-2$2.352$8.704▲ 270%
EU (Milan)eu-south-1$2.352$8.672▲ 269%
EU (Paris)eu-west-3$2.352$8.672▲ 269%
Asia Pacific (Jakarta)ap-southeast-3$2.40$8.864▲ 269%
Asia Pacific (Melbourne)ap-southeast-4$2.40$8.848▲ 269%
Asia Pacific (Osaka)ap-northeast-3$2.40$8.864▲ 269%
Asia Pacific (Seoul)ap-northeast-2$2.40$8.864▲ 269%
Asia Pacific (Singapore)ap-southeast-1$2.40$8.864▲ 269%
Asia Pacific (Sydney)ap-southeast-2$2.40$8.848▲ 269%
Asia Pacific (Tokyo)ap-northeast-1$2.40$8.864▲ 269%
AWS GovCloud (US-East)us-gov-east-1$2.41$8.976▲ 272%
AWS GovCloud (US-West)us-gov-west-1$2.41$8.96▲ 272%
EU (Frankfurt)eu-central-1$2.44$9.024▲ 270%
Middle East (Bahrain)me-south-1$2.464$9.088▲ 269%
Middle East (UAE)me-central-1$2.464$9.088▲ 269%
Canada West (Calgary)ca-west-1$2.56$8.192▲ 220%
Asia Pacific (Hong Kong)ap-east-1$2.64$9.75▲ 269%
Africa (Cape Town)af-south-1$2.666$9.824▲ 268%
Europe (Zurich)eu-central-2$2.688$9.926▲ 269%
South America (Sao Paulo)sa-east-1$4.188$15.552▲ 271%

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.4xlargedb.r6i.4xlarge.tpc2.mem2xdb.r6i.4xlarge.tpc2.mem3xdb.r6i.4xlarge.tpc2.mem8x
db.r6i.4xlarge.tpc2.mem4xMemory optimized, r6i family
db.r6i.4xlarge.tpc2.mem4x prices and specsEvery size in the r6i family

Compare db.r6i.4xlarge.tpc2.mem4x 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

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The best committed rate on these two is 28–42% 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.