db.r4.8xlargevsdb.r5.8xlarge.tpc2.mem3x

db.r4.8xlarge is 64% cheaper than db.r5.8xlarge.tpc2.mem3x on demand in US East (N. Virginia), saving $5,244.32 a month.

At a glancedb.r4.8xlargedb.r5.8xlarge.tpc2.mem3x
On-demand$4.00/hr64% less$11.184/hr
Size32 vCPUs, 244 GiB32 vCPUs, 768 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.r4.8xlargedb.r5.8xlarge.tpc2.mem3xdb.r5.8xlarge.tpc2.mem3x vs db.r4.8xlarge
On-demandPay by the hour$4.00$11.184▲ 180%
1-yr reservedNo upfront—42% off$6.469—

Key differences

The biggest lead each one has.

Where db.r4.8xlarge leads
On-demand price$4.00 vs $11.184 per hour
64% cheaper
Where db.r5.8xlarge.tpc2.mem3x leads
Memory (GiB)768 vs 244
3.1× higher
Clock speedUp to 3.1 GHz vs 2.3 GHz
35% higher

Specs

23 of 27 specs differ. Those are in bold.

Compute8 of 10 differdb.r4.8xlargedb.r5.8xlarge.tpc2.mem3x
vCPUs3232
Physical cores16–
Threads per core2–
Architecturex86_64x86_64
ProcessorIntel Xeon E5-2686 v4 (Broadwell)Intel Xeon Platinum 8175
CPU makerIntel–
Clock speed2.3 GHzUp to 3.1 GHz
Sustained clock2.3 GHz–
Processor featuresIntel AVX, Intel AVX2, Intel Turbo–
BurstableNo–
Memory1 of 1 differdb.r4.8xlargedb.r5.8xlarge.tpc2.mem3x
Memory (GiB)244768
Networking3 of 3 differdb.r4.8xlargedb.r5.8xlarge.tpc2.mem3x
Network10 Gigabit25 Gigabit
Network baseline12 Gbps–
Network peak12 Gbps–
Storage7 of 8 differdb.r4.8xlargedb.r5.8xlarge.tpc2.mem3x
StorageEBS OnlyEBS Only
EBS throughput6000 Mbps–
EBS baseline bandwidth7,000 Mbps–
EBS max bandwidth7,000 Mbps–
EBS baseline throughput875 MB/s–
EBS max throughput875 MB/s–
EBS baseline IOPS37,500–
EBS max IOPS37,500–
Instance details3 of 4 differdb.r4.8xlargedb.r5.8xlarge.tpc2.mem3x
Familyr4r5
CategoryMemory optimizedMemory optimized
Current generationNoYes
Normalization factor128192
Other1 of 1 differdb.r4.8xlargedb.r5.8xlarge.tpc2.mem3x
Hardware Basisr4.8xlarge–

On-demand prices by region

Cheapest for db.r4.8xlarge first. PostgreSQL, USD per hour.

Regiondb.r4.8xlargedb.r5.8xlarge.tpc2.mem3xDifference
US East (N. Virginia)Used in summaryus-east-1$4.00$11.184▲ 180%
US East (Ohio)us-east-2$4.00$11.184▲ 180%
US West (Oregon)us-west-2$4.00$11.184▲ 180%
Canada (Central)ca-central-1$4.324$12.288▲ 184%
EU (Ireland)eu-west-1$4.48$12.374▲ 176%
US West (N. California)us-west-1$4.48$12.326▲ 175%
Asia Pacific (Mumbai)ap-south-1$4.56$12.624▲ 177%
EU (London)eu-west-2$4.704$13.056▲ 178%
EU (Paris)eu-west-3$4.704$12.998▲ 176%
Asia Pacific (Osaka)ap-northeast-3$4.80$13.296▲ 177%
Asia Pacific (Seoul)ap-northeast-2$4.80$13.296▲ 177%
Asia Pacific (Singapore)ap-southeast-1$4.80$13.296▲ 177%
Asia Pacific (Sydney)ap-southeast-2$4.80$13.267▲ 176%
Asia Pacific (Tokyo)ap-northeast-1$4.80$13.296▲ 177%
AWS GovCloud (US-East)us-gov-east-1$4.816$13.464▲ 180%
AWS GovCloud (US-West)us-gov-west-1$4.816$13.459▲ 179%
EU (Frankfurt)eu-central-1$4.88$13.534▲ 177%
South America (Sao Paulo)sa-east-1$8.376$23.328▲ 179%

Keep exploring

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

db.r4.8xlargeMemory optimized, r4 family
db.r4.8xlarge prices and specsEvery size in the r4 family

Compare db.r4.8xlarge with

db.r3.8xlargedb.r5.8xlarge
db.r5.8xlarge.tpc2.mem3xMemory optimized, r5 family
db.r5.8xlarge.tpc2.mem3x prices and specsEvery size in the r5 family

Compare db.r5.8xlarge.tpc2.mem3x with

db.m5.8xlargedb.r5d.8xlargedb.r5b.8xlargedb.r5b.8xlarge.tpc2.mem3xdb.r6i.8xlargedb.r6i.8xlarge.tpc2.mem3xdb.r6i.8xlarge.tpc2.mem4x

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The best committed rate on these two is 0–42% 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.