db.r6i.4xlargevsdb.r6idn.4xlarge

db.r6i.4xlarge is 36% cheaper than db.r6idn.4xlarge on demand in US East (N. Virginia), saving $803.73 a month.

At a glancedb.r6i.4xlargedb.r6idn.4xlarge
On-demand$2.00/hr36% less$3.101/hr
Lowest rate$1.155/hr52% less1-yr reserved, no upfront$2.388/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.r6i.4xlargedb.r6idn.4xlargedb.r6idn.4xlarge vs db.r6i.4xlarge
On-demandPay by the hour$2.00$3.101▲ 55%
1-yr reservedNo upfront42% off$1.15523% off$2.388▲ 107%

Key differences

The biggest lead each one has.

Where db.r6i.4xlarge leads
On-demand price$2.00 vs $3.101 per hour
36% cheaper
Where db.r6idn.4xlarge leads
Network baseline25 Gbps vs 6.25 Gbps
4× higher
EBS baseline bandwidth12,500 Mbps vs 5,000 Mbps
2.5× higher

Specs

11 of 19 specs differ. Those are in bold.

ComputeAll 6 matchdb.r6i.4xlargedb.r6idn.4xlarge
vCPUs1616
Physical cores88
Threads per core22
CPU makerIntelIntel
Sustained clock3.5 GHz3.5 GHz
BurstableNoNo
MemoryAll 1 matchdb.r6i.4xlargedb.r6idn.4xlarge
Memory (GiB)128128
Networking2 of 2 differdb.r6i.4xlargedb.r6idn.4xlarge
Network baseline6.25 Gbps25 Gbps
Network peak12.5 Gbps50 Gbps
Storage7 of 7 differdb.r6i.4xlargedb.r6idn.4xlarge
Local disks–1 × 950 GB SSD
EBS baseline bandwidth5,000 Mbps12,500 Mbps
EBS max bandwidth10,000 Mbps25,000 Mbps
EBS baseline throughput625 MB/s1,562.5 MB/s
EBS max throughput1,250 MB/s3,125 MB/s
EBS baseline IOPS20,00050,000
EBS max IOPS40,000100,000
Instance details1 of 2 differdb.r6i.4xlargedb.r6idn.4xlarge
Familyr6ir6idn
Normalization factor3232
Other1 of 1 differdb.r6i.4xlargedb.r6idn.4xlarge
Hardware Basisr6i.4xlarger6idn.4xlarge

On-demand prices by region

Cheapest for db.r6i.4xlarge first. PostgreSQL, USD per hour.

Regiondb.r6i.4xlargedb.r6idn.4xlargeDifference
US East (N. Virginia)Used in summaryus-east-1$2.00$3.101▲ 55%
US East (Ohio)us-east-2$2.00$3.101▲ 55%
US West (Oregon)us-west-2$2.00$3.101▲ 55%
EU (Ireland)eu-west-1$2.24$3.457▲ 54%
Asia Pacific (Tokyo)ap-northeast-1$2.40$3.75▲ 56%

Keep exploring

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

db.r6i.4xlarger6i family
db.r6i.4xlarge prices and specsEvery size in the r6i family

Compare db.r6i.4xlarge with

db.m6i.4xlargedb.r6g.4xlargedb.r6id.4xlargedb.r6in.4xlargedb.r5.4xlargedb.r5.4xlarge.tpc2.mem2xdb.r5.4xlarge.tpc2.mem3xdb.r5.4xlarge.tpc2.mem4xdb.r7i.4xlargedb.r7i.4xlarge.tpc2.mem2xdb.r7i.4xlarge.tpc2.mem3xdb.r7i.4xlarge.tpc2.mem4x
db.r6idn.4xlarger6idn family
db.r6idn.4xlarge prices and specsEvery size in the r6idn family

Compare db.r6idn.4xlarge with

db.r6i.4xlarge.tpc2.mem2xdb.r6i.4xlarge.tpc2.mem3xdb.r6i.4xlarge.tpc2.mem4xdb.m6idn.4xlargedb.r6i.4xlarge.tpc2.mem8x

Pay the committed rate, with commitment protection

The best committed rate on these two is 23–42% 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.