db.r4.16xlargevsdb.r5.16xlarge

db.r4.16xlarge and db.r5.16xlarge cost the same on demand in US East (N. Virginia), $8.00 per hour.

At a glancedb.r4.16xlargedb.r5.16xlarge
On-demand$8.00/hr$8.00/hr
Size64 vCPUs, 488 GiB64 vCPUs, 512 GiB
ProcessorIntel Xeon E5-2686 v4 (Broadwell)Intel Xeon Platinum 8175
Architecturex86_64x86_64

Prices in US East (N. Virginia)

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

Optiondb.r4.16xlargedb.r5.16xlargedb.r5.16xlarge vs db.r4.16xlarge
On-demandPay by the hour$8.00$8.00Same
1-yr reservedNo upfront—42% off$4.62—

Key differences

The biggest lead each one has.

Where db.r4.16xlarge leads
Network baseline25 Gbps vs 20 Gbps
25% higher
EBS baseline IOPS75,000 vs 60,000
25% higher
Where db.r5.16xlarge leads
Clock speedUp to 3.1 GHz vs 2.3 GHz
35% higher
Memory (GiB)512 vs 488
5% higher

Specs

18 of 27 specs differ. Those are in bold.

Compute4 of 10 differdb.r4.16xlargedb.r5.16xlarge
vCPUs6464
Physical cores3232
Threads per core22
Architecturex86_64x86_64
ProcessorIntel Xeon E5-2686 v4 (Broadwell)Intel Xeon Platinum 8175
CPU makerIntelIntel
Clock speed2.3 GHzUp to 3.1 GHz
Sustained clock2.3 GHz3.1 GHz
Processor featuresIntel AVX, Intel AVX2, Intel Turbo–
BurstableNoNo
Memory1 of 1 differdb.r4.16xlargedb.r5.16xlarge
Memory (GiB)488512
Networking2 of 3 differdb.r4.16xlargedb.r5.16xlarge
Network20 Gigabit20 Gigabit
Network baseline25 Gbps20 Gbps
Network peak25 Gbps20 Gbps
Storage7 of 8 differdb.r4.16xlargedb.r5.16xlarge
StorageEBS OnlyEBS Only
EBS throughput12000 Mbps–
EBS baseline bandwidth14,000 Mbps13,600 Mbps
EBS max bandwidth14,000 Mbps13,600 Mbps
EBS baseline throughput1,750 MB/s1,700 MB/s
EBS max throughput1,750 MB/s1,700 MB/s
EBS baseline IOPS75,00060,000
EBS max IOPS75,00060,000
Instance details3 of 4 differdb.r4.16xlargedb.r5.16xlarge
Familyr4r5
CategoryMemory optimizedMemory optimized
Current generationNoYes
Normalization factor256128
Other1 of 1 differdb.r4.16xlargedb.r5.16xlarge
Hardware Basisr4.16xlarger5.16xlarge

On-demand prices by region

Cheapest for db.r4.16xlarge first. PostgreSQL, USD per hour.

Regiondb.r4.16xlargedb.r5.16xlargeDifference
US East (N. Virginia)Used in summaryus-east-1$8.00$8.00Same
US East (Ohio)us-east-2$8.00$8.00Same
US West (Oregon)us-west-2$8.00$8.00Same
Canada (Central)ca-central-1$8.647$8.648Same
EU (Ireland)eu-west-1$8.96$8.96Same
US West (N. California)us-west-1$8.96$8.96Same
Asia Pacific (Mumbai)ap-south-1$9.12$9.12Same
EU (London)eu-west-2$9.408$9.408Same
EU (Paris)eu-west-3$9.408$9.408Same
Asia Pacific (Osaka)ap-northeast-3$9.60$9.60Same
Asia Pacific (Seoul)ap-northeast-2$9.60$9.60Same
Asia Pacific (Singapore)ap-southeast-1$9.60$9.60Same
Asia Pacific (Sydney)ap-southeast-2$9.60$9.60Same
Asia Pacific (Tokyo)ap-northeast-1$9.60$9.60Same
AWS GovCloud (US-East)us-gov-east-1$9.632$9.63Same
AWS GovCloud (US-West)us-gov-west-1$9.632$9.63Same
EU (Frankfurt)eu-central-1$9.76$9.76Same
South America (Sao Paulo)sa-east-1$16.752$16.752Same

Keep exploring

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

db.r4.16xlargeMemory optimized, r4 family
db.r4.16xlarge prices and specsEvery size in the r4 family

Compare db.r4.16xlarge with

db.m4.16xlarge
db.r5.16xlargeMemory optimized, r5 family
db.r5.16xlarge prices and specsEvery size in the r5 family

Compare db.r5.16xlarge with

db.m5.16xlargedb.r5d.16xlargedb.r5b.16xlargedb.r6i.16xlarge

Pay the committed rate, with commitment protection

The best committed rate on these two is 0–42% below on-demand. Connect your cloud accounts to unlock greater savings with commitment protection.

Connect AWS account

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