db.m5.4xlargevsdb.m6i.4xlarge

db.m5.4xlarge and db.m6i.4xlarge cost the same on demand in US East (N. Virginia), $1.424 per hour.

At a glancedb.m5.4xlargedb.m6i.4xlarge
On-demand$1.424/hr$1.424/hr
Lowest rate$0.9121/hr1-yr reserved, no upfront$0.912/hr0% less1-yr reserved, no upfront
Size16 vCPUs, 64 GiB16 vCPUs, 64 GiB

Prices in US East (N. Virginia)

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

Optiondb.m5.4xlargedb.m6i.4xlargedb.m6i.4xlarge vs db.m5.4xlarge
On-demandPay by the hour$1.424$1.424Same
1-yr reservedNo upfront36% off$0.912136% off$0.912Same

Key differences

The biggest lead each one has.

Where db.m5.4xlarge leads

No clear lead on the measures we compare.

Where db.m6i.4xlarge leads
EBS max IOPS40,000 vs 18,750
2.1× higher
Network baseline6.25 Gbps vs 5 Gbps
25% higher
Sustained clock3.5 GHz vs 3.1 GHz
13% higher

Specs

12 of 20 specs differ. Those are in bold.

Compute1 of 6 differdb.m5.4xlargedb.m6i.4xlarge
vCPUs1616
Physical cores88
Threads per core22
CPU makerIntelIntel
Sustained clock3.1 GHz3.5 GHz
BurstableNoNo
MemoryAll 1 matchdb.m5.4xlargedb.m6i.4xlarge
Memory (GiB)6464
Networking2 of 2 differdb.m5.4xlargedb.m6i.4xlarge
Network baseline5 Gbps6.25 Gbps
Network peak10 Gbps12.5 Gbps
Storage6 of 7 differdb.m5.4xlargedb.m6i.4xlarge
StorageEBS OnlyEBS Only
EBS baseline bandwidth4,750 Mbps5,000 Mbps
EBS max bandwidth4,750 Mbps10,000 Mbps
EBS baseline throughput593.75 MB/s625 MB/s
EBS max throughput593.75 MB/s1,250 MB/s
EBS baseline IOPS18,75020,000
EBS max IOPS18,75040,000
Instance details2 of 3 differdb.m5.4xlargedb.m6i.4xlarge
Familym5m6i
CategoryGeneral purposeGeneral purpose
Normalization factor64–
Other1 of 1 differdb.m5.4xlargedb.m6i.4xlarge
Hardware Basism5.4xlargem6i.4xlarge

On-demand prices by region

Cheapest for db.m5.4xlarge first. PostgreSQL, USD per hour.

Regiondb.m5.4xlargedb.m6i.4xlargeDifference
US East (N. Virginia)Used in summaryus-east-1$1.424$1.424Same
US East (Ohio)us-east-2$1.424$1.424Same
US West (Oregon)us-west-2$1.424$1.424Same
EU (Stockholm)eu-north-1$1.497$1.496Same
Canada (Central)ca-central-1$1.568$1.568Same
EU (Ireland)eu-west-1$1.576$1.576Same
Europe (Spain)eu-south-2$1.576$1.576Same
US West (N. California)us-west-1$1.624$1.624Same
EU (London)eu-west-2$1.648$1.648Same
EU (Paris)eu-west-3$1.648$1.648Same
EU (Milan)eu-south-1$1.655$1.654Same
Israel (Tel Aviv)il-central-1$1.655$1.655Same
EU (Frankfurt)eu-central-1$1.696$1.696Same
AWS GovCloud (US-East)us-gov-east-1$1.70$1.68▼ 1%
AWS GovCloud (US-West)us-gov-west-1$1.70$1.68▼ 1%
Middle East (Bahrain)me-south-1$1.734$1.736Same
Middle East (UAE)me-central-1$1.736$1.664▼ 4%
South America (Sao Paulo)sa-east-1$1.864$1.864Same
Europe (Zurich)eu-central-2$1.866$1.864Same
Africa (Cape Town)af-south-1$1.875$1.872Same
Asia Pacific (Jakarta)ap-southeast-3$1.976$1.976Same
Asia Pacific (Seoul)ap-northeast-2$1.976$1.976Same
Asia Pacific (Singapore)ap-southeast-1$1.976$1.976Same
Asia Pacific (Sydney)ap-southeast-2$1.976$1.976Same
Asia Pacific (Tokyo)ap-northeast-1$1.976$1.976Same
Asia Pacific (Hyderabad)ap-south-2$2.024$2.024Same
Asia Pacific (Mumbai)ap-south-1$2.024$2.024Same
Asia Pacific (Osaka)ap-northeast-3$2.074$2.072Same
Asia Pacific (Hong Kong)ap-east-1$2.174$2.174Same

Keep exploring

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

db.m5.4xlargeGeneral purpose, m5 family
db.m5.4xlarge prices and specsEvery size in the m5 family

Compare db.m5.4xlarge with

db.m5d.4xlargedb.r5.4xlargedb.r5.4xlarge.tpc2.mem2xdb.r5.4xlarge.tpc2.mem3xdb.r5.4xlarge.tpc2.mem4xdb.m4.4xlarge
db.m6i.4xlargeGeneral purpose, m6i family
db.m6i.4xlarge prices and specsEvery size in the m6i family

Compare db.m6i.4xlarge with

db.m6g.4xlargedb.r6i.4xlargedb.r6i.4xlarge.tpc2.mem2xdb.r6i.4xlarge.tpc2.mem3xdb.r6i.4xlarge.tpc2.mem4xdb.m6id.4xlargedb.m6idn.4xlargedb.m6in.4xlargedb.r6i.4xlarge.tpc2.mem8xdb.m7i.4xlarge

Pay the committed rate, with commitment protection

The best committed rate on these two is 36% 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.