db.r6i.16xlargevsdb.r6idn.16xlarge

db.r6i.16xlarge is 36% cheaper than db.r6idn.16xlarge on demand in US East (N. Virginia), saving $3,215.65 a month.

At a glancedb.r6i.16xlargedb.r6idn.16xlarge
On-demand$8.00/hr36% less$12.405/hr
Lowest rate$4.621/hr52% less1-yr reserved, no upfront$9.552/hr1-yr reserved, no upfront
Size64 vCPUs, 512 GiB64 vCPUs, 512 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.16xlargedb.r6idn.16xlargedb.r6idn.16xlarge vs db.r6i.16xlarge
On-demandPay by the hour$8.00$12.405▲ 55%
1-yr reservedNo upfront42% off$4.62123% off$9.552▲ 107%

Key differences

The biggest lead each one has.

Where db.r6i.16xlarge leads
On-demand price$8.00 vs $12.405 per hour
36% cheaper
Where db.r6idn.16xlarge leads
Network baseline100 Gbps vs 25 Gbps
4× higher
EBS baseline bandwidth50,000 Mbps vs 20,000 Mbps
2.5× higher

Specs

17 of 25 specs differ. Those are in bold.

Compute2 of 8 differdb.r6i.16xlargedb.r6idn.16xlarge
vCPUs6464
Physical cores3232
Threads per core22
Architecturex86_64–
ProcessorIntel Xeon Scalable Ice Lake–
CPU makerIntelIntel
Sustained clock3.5 GHz3.5 GHz
BurstableNoNo
MemoryAll 1 matchdb.r6i.16xlargedb.r6idn.16xlarge
Memory (GiB)512512
Networking3 of 3 differdb.r6i.16xlargedb.r6idn.16xlarge
Network25 Gbps–
Network baseline25 Gbps100 Gbps
Network peak25 Gbps100 Gbps
Storage8 of 8 differdb.r6i.16xlargedb.r6idn.16xlarge
StorageEBS Only–
Local disks–2 × 1,900 GB SSD
EBS baseline bandwidth20,000 Mbps50,000 Mbps
EBS max bandwidth20,000 Mbps50,000 Mbps
EBS baseline throughput2,500 MB/s6,250 MB/s
EBS max throughput2,500 MB/s6,250 MB/s
EBS baseline IOPS80,000200,000
EBS max IOPS80,000200,000
Instance details3 of 4 differdb.r6i.16xlargedb.r6idn.16xlarge
Familyr6ir6idn
CategoryMemory optimized–
Current generationYes–
Normalization factor128128
Other1 of 1 differdb.r6i.16xlargedb.r6idn.16xlarge
Hardware Basisr6i.16xlarger6idn.16xlarge

On-demand prices by region

Cheapest for db.r6i.16xlarge first. PostgreSQL, USD per hour.

Regiondb.r6i.16xlargedb.r6idn.16xlargeDifference
US East (N. Virginia)Used in summaryus-east-1$8.00$12.405▲ 55%
US East (Ohio)us-east-2$8.00$12.405▲ 55%
US West (Oregon)us-west-2$8.00$12.405▲ 55%
EU (Ireland)eu-west-1$8.96$13.829▲ 54%
Asia Pacific (Tokyo)ap-northeast-1$9.60$15.001▲ 56%

Keep exploring

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

db.r6i.16xlargeMemory optimized, r6i family
db.r6i.16xlarge prices and specsEvery size in the r6i family

Compare db.r6i.16xlarge with

db.m6i.16xlargedb.r6g.16xlargedb.r6id.16xlargedb.r6in.16xlargedb.r5.16xlargedb.r7i.16xlarge
db.r6idn.16xlarger6idn family
db.r6idn.16xlarge prices and specsEvery size in the r6idn family

Compare db.r6idn.16xlarge with

db.m6idn.16xlarge

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.