db.r7i.4xlargevsdb.r8i.4xlarge

db.r7i.4xlarge is 5% cheaper than db.r8i.4xlarge on demand in US East (N. Virginia), saving $73.00 a month.

At a glancedb.r7i.4xlargedb.r8i.4xlarge
On-demand$2.00/hr5% less$2.10/hr
Lowest rate$1.34/hr5% less1-yr reserved, no upfront$1.407/hr1-yr reserved, no upfront
Size16 vCPUs, 128 GiB16 vCPUs, 128 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.4xlargedb.r8i.4xlargedb.r8i.4xlarge vs db.r7i.4xlarge
On-demandPay by the hour$2.00$2.10▲ 5%
1-yr reservedNo upfront33% off$1.3433% off$1.407▲ 5%
3-yr reservedNo upfront—53% off$0.987—
1-yr savings planHourly commitment20% off$1.6020% off$1.68▲ 5%

Key differences

The biggest lead each one has.

Where db.r7i.4xlarge leads
On-demand price$2.00 vs $2.10 per hour
5% cheaper
Where db.r8i.4xlarge leads
Sustained clock3.9 GHz vs 3.2 GHz
22% higher
Network baseline7.5 Gbps vs 6.25 Gbps
20% higher

Specs

6 of 18 specs differ. Those are in bold.

Compute1 of 6 differdb.r7i.4xlargedb.r8i.4xlarge
vCPUs1616
Physical cores88
Threads per core22
CPU makerIntelIntel
Sustained clock3.2 GHz3.9 GHz
BurstableNoNo
MemoryAll 1 matchdb.r7i.4xlargedb.r8i.4xlarge
Memory (GiB)128128
Networking2 of 2 differdb.r7i.4xlargedb.r8i.4xlarge
Network baseline6.25 Gbps7.5 Gbps
Network peak12.5 Gbps15 Gbps
StorageAll 6 matchdb.r7i.4xlargedb.r8i.4xlarge
EBS baseline bandwidth5,000 Mbps5,000 Mbps
EBS max bandwidth10,000 Mbps10,000 Mbps
EBS baseline throughput625 MB/s625 MB/s
EBS max throughput1,250 MB/s1,250 MB/s
EBS baseline IOPS20,00020,000
EBS max IOPS40,00040,000
Instance details2 of 2 differdb.r7i.4xlargedb.r8i.4xlarge
Familyr7ir8i
Normalization factor–32
Other1 of 1 differdb.r7i.4xlargedb.r8i.4xlarge
Hardware Basisr7i.4xlarger8i.4xlarge

On-demand prices by region

Cheapest for db.r7i.4xlarge first. PostgreSQL, USD per hour.

Regiondb.r7i.4xlargedb.r8i.4xlargeDifference
US East (N. Virginia)Used in summaryus-east-1$2.00$2.10▲ 5%
US East (Ohio)us-east-2$2.00$2.10▲ 5%
US West (Oregon)us-west-2$2.00$2.10▲ 5%
Asia Pacific (Malaysia)ap-southeast-5$2.04$2.14▲ 5%
EU (Stockholm)eu-north-1$2.056$2.159▲ 5%
Canada (Central)ca-central-1$2.16$2.27▲ 5%
EU (Ireland)eu-west-1$2.24$2.35▲ 5%
Europe (Spain)eu-south-2$2.24$2.35▲ 5%
US West (N. California)us-west-1$2.24$2.35▲ 5%
Asia Pacific (Mumbai)ap-south-1$2.28$2.39▲ 5%
EU (London)eu-west-2$2.352$2.47▲ 5%
EU (Milan)eu-south-1$2.352$2.47▲ 5%
EU (Paris)eu-west-3$2.352$2.47▲ 5%
Asia Pacific (Seoul)ap-northeast-2$2.40$2.52▲ 5%
Asia Pacific (Singapore)ap-southeast-1$2.40$2.52▲ 5%
Asia Pacific (Sydney)ap-southeast-2$2.40$2.52▲ 5%
Asia Pacific (Tokyo)ap-northeast-1$2.40$2.52▲ 5%
EU (Frankfurt)eu-central-1$2.44$2.56▲ 5%
Asia Pacific (New Zealand)ap-southeast-6$2.52$2.65▲ 5%
Asia Pacific (Hyderabad)ap-south-2$2.64$2.39▼ 9%
South America (Sao Paulo)sa-east-1$3.18$3.307▲ 4%

Keep exploring

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

db.r7i.4xlarger7i family
db.r7i.4xlarge prices and specsEvery size in the r7i family

Compare db.r7i.4xlarge with

db.r7g.4xlargedb.m7i.4xlargedb.r6i.4xlargedb.r6i.4xlarge.tpc2.mem2xdb.r6i.4xlarge.tpc2.mem3xdb.r6i.4xlarge.tpc2.mem4xdb.r6i.4xlarge.tpc2.mem8x
db.r8i.4xlarger8i family
db.r8i.4xlarge prices and specsEvery size in the r8i family

Compare db.r8i.4xlarge with

db.m8i.4xlargedb.r8g.4xlargedb.r8a.4xlargedb.r7i.4xlarge.tpc2.mem2xdb.r7i.4xlarge.tpc2.mem3xdb.r7i.4xlarge.tpc2.mem4x

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.