db.r5.8xlargevsdb.r6i.8xlarge.tpc2.mem4x

db.r5.8xlarge is 73% cheaper than db.r6i.8xlarge.tpc2.mem4x on demand in US East (N. Virginia), saving $7,965.76 a month.

At a glancedb.r5.8xlargedb.r6i.8xlarge.tpc2.mem4x
On-demand$4.00/hr73% less$14.912/hr
Lowest rate$2.31/hr78% less1-yr reserved, no upfront$10.737/hr1-yr reserved, no upfront
Size32 vCPUs, 256 GiB32 vCPUs, 1024 GiB
ProcessorIntel Xeon Platinum 8175Intel Xeon Scalable Ice Lake
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.r5.8xlargedb.r6i.8xlarge.tpc2.mem4xdb.r6i.8xlarge.tpc2.mem4x vs db.r5.8xlarge
On-demandPay by the hour$4.00$14.912▲ 273%
1-yr reservedNo upfront42% off$2.3128% off$10.737▲ 365%

Key differences

The biggest lead each one has.

Where db.r5.8xlarge leads
On-demand price$4.00 vs $14.912 per hour
73% cheaper
Where db.r6i.8xlarge.tpc2.mem4x leads
Memory (GiB)1,024 vs 256
4× higher

Specs

20 of 25 specs differ. Those are in bold.

Compute7 of 9 differdb.r5.8xlargedb.r6i.8xlarge.tpc2.mem4x
vCPUs3232
Physical cores16–
Threads per core2–
Architecturex86_64x86_64
ProcessorIntel Xeon Platinum 8175Intel Xeon Scalable Ice Lake
CPU makerIntel–
Clock speedUp to 3.1 GHz–
Sustained clock3.1 GHz–
BurstableNo–
Memory1 of 1 differdb.r5.8xlargedb.r6i.8xlarge.tpc2.mem4x
Memory (GiB)2561,024
Networking3 of 3 differdb.r5.8xlargedb.r6i.8xlarge.tpc2.mem4x
Network10 Gigabit50 Gbps
Network baseline10 Gbps–
Network peak10 Gbps–
Storage6 of 7 differdb.r5.8xlargedb.r6i.8xlarge.tpc2.mem4x
StorageEBS OnlyEBS Only
EBS baseline bandwidth6,800 Mbps–
EBS max bandwidth6,800 Mbps–
EBS baseline throughput850 MB/s–
EBS max throughput850 MB/s–
EBS baseline IOPS30,000–
EBS max IOPS30,000–
Instance details2 of 4 differdb.r5.8xlargedb.r6i.8xlarge.tpc2.mem4x
Familyr5r6i
CategoryMemory optimizedMemory optimized
Current generationYesYes
Normalization factor–512
Other1 of 1 differdb.r5.8xlargedb.r6i.8xlarge.tpc2.mem4x
Hardware Basisr5.8xlarge–

On-demand prices by region

Cheapest for db.r5.8xlarge first. PostgreSQL, USD per hour.

Regiondb.r5.8xlargedb.r6i.8xlarge.tpc2.mem4xDifference
US East (N. Virginia)Used in summaryus-east-1$4.00$14.912▲ 273%
US East (Ohio)us-east-2$4.00$14.912▲ 273%
US West (Oregon)us-west-2$4.00$14.912▲ 273%
EU (Stockholm)eu-north-1$4.114$15.68▲ 281%
Canada (Central)ca-central-1$4.324$16.384▲ 279%
EU (Ireland)eu-west-1$4.48$16.512▲ 269%
Europe (Spain)eu-south-2$4.48$16.471▲ 268%
US West (N. California)us-west-1$4.48$16.448▲ 267%
Asia Pacific (Hyderabad)ap-south-2$4.56$16.832▲ 269%
Asia Pacific (Mumbai)ap-south-1$4.56$16.832▲ 269%
Israel (Tel Aviv)il-central-1$4.70$17.281▲ 268%
EU (London)eu-west-2$4.704$17.408▲ 270%
EU (Milan)eu-south-1$4.704$17.344▲ 269%
EU (Paris)eu-west-3$4.704$17.344▲ 269%
Asia Pacific (Jakarta)ap-southeast-3$4.80$17.684▲ 268%
Asia Pacific (Melbourne)ap-southeast-4$4.80$17.645▲ 268%
Asia Pacific (Osaka)ap-northeast-3$4.80$17.728▲ 269%
Asia Pacific (Seoul)ap-northeast-2$4.80$17.728▲ 269%
Asia Pacific (Singapore)ap-southeast-1$4.80$17.728▲ 269%
Asia Pacific (Sydney)ap-southeast-2$4.80$17.664▲ 268%
Asia Pacific (Tokyo)ap-northeast-1$4.80$17.728▲ 269%
AWS GovCloud (US-East)us-gov-east-1$4.82$17.952▲ 272%
AWS GovCloud (US-West)us-gov-west-1$4.82$17.92▲ 272%
EU (Frankfurt)eu-central-1$4.88$18.048▲ 270%
Middle East (Bahrain)me-south-1$4.928$18.176▲ 269%
Middle East (UAE)me-central-1$4.928$18.176▲ 269%
Canada West (Calgary)ca-west-1$5.12$16.384▲ 220%
Asia Pacific (Hong Kong)ap-east-1$5.28$19.501▲ 269%
Africa (Cape Town)af-south-1$5.331$19.648▲ 269%
Europe (Zurich)eu-central-2$5.376$19.804▲ 268%
South America (Sao Paulo)sa-east-1$8.376$31.104▲ 271%

Keep exploring

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

db.r5.8xlargeMemory optimized, r5 family
db.r5.8xlarge prices and specsEvery size in the r5 family

Compare db.r5.8xlarge with

db.m5.8xlargedb.r5d.8xlargedb.r5b.8xlargedb.r5b.8xlarge.tpc2.mem3xdb.r4.8xlargedb.r6i.8xlargedb.r6i.8xlarge.tpc2.mem3x
db.r6i.8xlarge.tpc2.mem4xMemory optimized, r6i family
db.r6i.8xlarge.tpc2.mem4x prices and specsEvery size in the r6i family

Compare db.r6i.8xlarge.tpc2.mem4x with

db.m6i.8xlargedb.r6g.8xlargedb.r6id.8xlargedb.r6idn.8xlargedb.r6in.8xlargedb.r5.8xlarge.tpc2.mem3xdb.r7i.8xlargedb.r7i.8xlarge.tpc2.mem2xdb.r7i.8xlarge.tpc2.mem3x

Pay the committed rate, with commitment protection

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.