db.r7i.8xlargevsdb.r8i.8xlarge

db.r7i.8xlarge is 5% cheaper than db.r8i.8xlarge on demand in US East (N. Virginia), saving $146.00 a month.

At a glancedb.r7i.8xlargedb.r8i.8xlarge
On-demand$4.00/hr5% less$4.20/hr
Lowest rate$2.68/hr5% less1-yr reserved, no upfront$2.814/hr1-yr reserved, no upfront
Size32 vCPUs, 256 GiB32 vCPUs, 256 GiB

Prices in US East (N. Virginia)

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

Optiondb.r7i.8xlargedb.r8i.8xlargedb.r8i.8xlarge vs db.r7i.8xlarge
On-demandPay by the hour$4.00$4.20▲ 5%
1-yr reservedNo upfront33% off$2.6833% off$2.814▲ 5%
3-yr reservedNo upfront—53% off$1.974—
1-yr savings planHourly commitment20% off$3.2020% off$3.36▲ 5%

Key differences

The biggest lead each one has.

Where db.r7i.8xlarge leads
On-demand price$4.00 vs $4.20 per hour
5% cheaper
Where db.r8i.8xlarge leads
Sustained clock3.9 GHz vs 3.2 GHz
22% higher
Network baseline15 Gbps vs 12.5 Gbps
20% higher

Specs

12 of 24 specs differ. Those are in bold.

Compute3 of 8 differdb.r7i.8xlargedb.r8i.8xlarge
vCPUs3232
Physical cores1616
Threads per core22
Architecturex86_64–
ProcessorIntel Xeon Scalable (Sapphire Rapids 8488C)–
CPU makerIntelIntel
Sustained clock3.2 GHz3.9 GHz
BurstableNoNo
MemoryAll 1 matchdb.r7i.8xlargedb.r8i.8xlarge
Memory (GiB)256256
Networking3 of 3 differdb.r7i.8xlargedb.r8i.8xlarge
Network12.5 Gbps–
Network baseline12.5 Gbps15 Gbps
Network peak12.5 Gbps15 Gbps
Storage1 of 7 differdb.r7i.8xlargedb.r8i.8xlarge
StorageAurora IO Optimization Mode–
EBS baseline bandwidth10,000 Mbps10,000 Mbps
EBS max bandwidth10,000 Mbps10,000 Mbps
EBS baseline throughput1,250 MB/s1,250 MB/s
EBS max throughput1,250 MB/s1,250 MB/s
EBS baseline IOPS40,00040,000
EBS max IOPS40,00040,000
Instance details4 of 4 differdb.r7i.8xlargedb.r8i.8xlarge
Familyr7ir8i
CategoryMemory optimized–
Current generationYes–
Normalization factor83.2–
Other1 of 1 differdb.r7i.8xlargedb.r8i.8xlarge
Hardware Basisr7i.8xlarger8i.8xlarge

On-demand prices by region

Cheapest for db.r7i.8xlarge first. PostgreSQL, USD per hour.

Regiondb.r7i.8xlargedb.r8i.8xlargeDifference
US East (N. Virginia)Used in summaryus-east-1$4.00$4.20▲ 5%
US East (Ohio)us-east-2$4.00$4.20▲ 5%
US West (Oregon)us-west-2$4.00$4.20▲ 5%
Asia Pacific (Malaysia)ap-southeast-5$4.08$4.28▲ 5%
EU (Stockholm)eu-north-1$4.112$4.318▲ 5%
Canada (Central)ca-central-1$4.32$4.54▲ 5%
EU (Ireland)eu-west-1$4.48$4.70▲ 5%
Europe (Spain)eu-south-2$4.48$4.70▲ 5%
US West (N. California)us-west-1$4.48$4.70▲ 5%
Asia Pacific (Mumbai)ap-south-1$4.56$4.79▲ 5%
EU (London)eu-west-2$4.704$4.94▲ 5%
EU (Milan)eu-south-1$4.704$4.94▲ 5%
EU (Paris)eu-west-3$4.704$4.94▲ 5%
Asia Pacific (Seoul)ap-northeast-2$4.80$5.04▲ 5%
Asia Pacific (Singapore)ap-southeast-1$4.80$5.04▲ 5%
Asia Pacific (Sydney)ap-southeast-2$4.80$5.04▲ 5%
Asia Pacific (Tokyo)ap-northeast-1$4.80$5.04▲ 5%
EU (Frankfurt)eu-central-1$4.88$5.12▲ 5%
Asia Pacific (New Zealand)ap-southeast-6$5.04$5.29▲ 5%
Asia Pacific (Hyderabad)ap-south-2$5.28$4.79▼ 9%
South America (Sao Paulo)sa-east-1$6.36$6.614▲ 4%

Keep exploring

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

db.r7i.8xlargeMemory optimized, r7i family
db.r7i.8xlarge prices and specsEvery size in the r7i family

Compare db.r7i.8xlarge with

db.r7g.8xlargedb.m7i.8xlargedb.r6i.8xlargedb.r6i.8xlarge.tpc2.mem3xdb.r6i.8xlarge.tpc2.mem4x
db.r8i.8xlarger8i family
db.r8i.8xlarge prices and specsEvery size in the r8i family

Compare db.r8i.8xlarge with

db.m8i.8xlargedb.r8g.8xlargedb.r8a.8xlargedb.r7i.8xlarge.tpc2.mem2xdb.r7i.8xlarge.tpc2.mem3x

Pay the committed rate, with commitment protection

The best committed rate on these two is 33–53% 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.