db.m3.xlargevsdb.m4.xlarge

db.m4.xlarge is 6% cheaper than db.m3.xlarge on demand in US East (N. Virginia), saving $18.25 a month.

At a glancedb.m3.xlargedb.m4.xlarge
On-demand$0.39/hr$0.365/hr6% less
Size4 vCPUs, 15 GiB4 vCPUs, 16 GiB

Prices in US East (N. Virginia)

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

Optiondb.m3.xlargedb.m4.xlargedb.m4.xlarge vs db.m3.xlarge
On-demandPay by the hour$0.39$0.365▼ 6%

Key differences

The biggest lead each one has.

Where db.m3.xlarge leads
Network peak10 Gbps vs 2.8 Gbps
3.6× higher
Sustained clock2.5 GHz vs 2.4 GHz
4% higher
Where db.m4.xlarge leads
On-demand price$0.365 vs $0.39 per hour
6% cheaper
EBS baseline bandwidth750 Mbps vs 500 Mbps
50% higher
Memory (GiB)16 vs 15
7% higher

Specs

14 of 19 specs differ. Those are in bold.

Compute1 of 6 differdb.m3.xlargedb.m4.xlarge
vCPUs44
Physical cores22
Threads per core22
CPU makerIntelIntel
Sustained clock2.5 GHz2.4 GHz
BurstableNoNo
Memory1 of 1 differdb.m3.xlargedb.m4.xlarge
Memory (GiB)1516
Networking2 of 2 differdb.m3.xlargedb.m4.xlarge
Network baseline1 Gbps0.75 Gbps
Network peak10 Gbps2.8 Gbps
Storage7 of 7 differdb.m3.xlargedb.m4.xlarge
Local disks2 × 40 GB SSD–
EBS baseline bandwidth500 Mbps750 Mbps
EBS max bandwidth500 Mbps750 Mbps
EBS baseline throughput62.5 MB/s93.75 MB/s
EBS max throughput62.5 MB/s93.75 MB/s
EBS baseline IOPS4,0006,000
EBS max IOPS4,0006,000
Instance details2 of 2 differdb.m3.xlargedb.m4.xlarge
Familym3m4
Normalization factor–8
Other1 of 1 differdb.m3.xlargedb.m4.xlarge
Hardware Basism3.xlargem4.xlarge

On-demand prices by region

Cheapest for db.m3.xlarge first. PostgreSQL, USD per hour.

Regiondb.m3.xlargedb.m4.xlargeDifference
US East (N. Virginia)Used in summaryus-east-1$0.39$0.365▼ 6%
US West (Oregon)us-west-2$0.39$0.365▼ 6%
EU (Ireland)eu-west-1$0.42$0.403▼ 4%
US West (N. California)us-west-1$0.42$0.426▲ 1%
AWS GovCloud (US-West)us-gov-west-1$0.445$0.436▼ 2%
EU (Frankfurt)eu-central-1$0.455$0.435▼ 4%
Asia Pacific (Tokyo)ap-northeast-1$0.485$0.53▲ 9%
South America (Sao Paulo)sa-east-1$0.49$0.477▼ 3%
Asia Pacific (Singapore)ap-southeast-1$0.5$0.542▲ 8%
Asia Pacific (Sydney)ap-southeast-2$0.5$0.513▲ 3%

Keep exploring

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

db.m3.xlargem3 family
db.m3.xlarge prices and specsEvery size in the m3 family

Compare db.m3.xlarge with

db.r3.xlargedb.m2.xlarge
db.m4.xlargem4 family
db.m4.xlarge prices and specsEvery size in the m4 family

Compare db.m4.xlarge with

db.t3.xlargedb.r4.xlargedb.t2.xlargedb.m5.xlarge

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AWS RDS PostgreSQL prices in USD. Monthly figures use 730 hours. Prices last updated 12 Nov 2026.