db.m8g.12xlargevsdb.m9g.12xlarge

db.m8g.12xlarge is 8% cheaper than db.m9g.12xlarge on demand in US East (N. Virginia), saving $264.99 a month.

At a glancedb.m8g.12xlargedb.m9g.12xlarge
On-demand$4.032/hr8% less$4.395/hr
Lowest rate$3.226/hr8% less1-yr savings plan, hourly commitment$3.516/hr1-yr savings plan, hourly commitment
Size48 vCPUs, 192 GiB48 vCPUs, 192 GiB
Architecturearm64arm64

Prices in US East (N. Virginia)

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

Optiondb.m8g.12xlargedb.m9g.12xlargedb.m9g.12xlarge vs db.m8g.12xlarge
On-demandPay by the hour$4.032$4.395▲ 9%
1-yr reservedNo upfront33% off$2.701——
3-yr reservedNo upfront53% off$1.895——
1-yr savings planHourly commitment20% off$3.22620% off$3.516▲ 9%

Key differences

The biggest lead each one has.

Where db.m8g.12xlarge leads
On-demand price$4.032 vs $4.395 per hour
8% cheaper
Where db.m9g.12xlarge leads
EBS baseline bandwidth18,000 Mbps vs 15,000 Mbps
20% higher
Sustained clock3.3 GHz vs 2.8 GHz
18% higher
Network baseline25 Gbps vs 22.5 Gbps
11% higher

Specs

17 of 24 specs differ. Those are in bold.

Compute2 of 8 differdb.m8g.12xlargedb.m9g.12xlarge
vCPUs4848
Physical cores4848
Threads per core11
Architecturearm64arm64
Processor–AWS Graviton5
CPU makerAWSAWS
Sustained clock2.8 GHz3.3 GHz
BurstableNoNo
MemoryAll 1 matchdb.m8g.12xlargedb.m9g.12xlarge
Memory (GiB)192192
Networking3 of 3 differdb.m8g.12xlargedb.m9g.12xlarge
Network–25 Gigabit
Network baseline22.5 Gbps25 Gbps
Network peak22.5 Gbps25 Gbps
Storage7 of 7 differdb.m8g.12xlargedb.m9g.12xlarge
Storage–EBS Only
EBS baseline bandwidth15,000 Mbps18,000 Mbps
EBS max bandwidth15,000 Mbps18,000 Mbps
EBS baseline throughput1,875 MB/s2,250 MB/s
EBS max throughput1,875 MB/s2,250 MB/s
EBS baseline IOPS60,00072,000
EBS max IOPS60,00072,000
Instance details4 of 4 differdb.m8g.12xlargedb.m9g.12xlarge
Familym8gm9g
Category–General purpose
Current generation–Yes
Normalization factor96192
Other1 of 1 differdb.m8g.12xlargedb.m9g.12xlarge
Hardware Basism8g.12xlargem9g.12xlarge

On-demand prices by region

Cheapest for db.m8g.12xlarge first. PostgreSQL, USD per hour.

Regiondb.m8g.12xlargedb.m9g.12xlargeDifference
US East (N. Virginia)Used in summaryus-east-1$4.032$4.395▲ 9%
US East (Ohio)us-east-2$4.032$4.395▲ 9%
US West (Oregon)us-west-2$4.032$4.395▲ 9%
EU (Frankfurt)eu-central-1$4.80$5.232▲ 9%

Keep exploring

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

db.m8g.12xlargem8g family
db.m8g.12xlarge prices and specsEvery size in the m8g family

Compare db.m8g.12xlarge with

db.m8i.12xlargedb.r8g.12xlargedb.m8a.12xlargedb.m8gd.12xlargedb.m7g.12xlarge
db.m9g.12xlargeGeneral purpose, m9g family
db.m9g.12xlarge prices and specsEvery size in the m9g family

Pay the committed rate, with commitment protection

The best committed rate on these two is 20–53% 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.