db.m8g.12xlargevsdb.m8i.12xlarge

db.m8g.12xlarge is 10% cheaper than db.m8i.12xlarge on demand in US East (N. Virginia), saving $334.34 a month. Per vCPU, db.m8g.12xlarge costs 55% less. They use different processor architectures (arm64 and x86_64), so software built for one may need rebuilding to run on the other.

At a glancedb.m8g.12xlargedb.m8i.12xlarge
On-demand$4.032/hr10% less$4.49/hr
Lowest rate$1.895/hr10% less3-yr reserved, no upfront$2.11/hr3-yr reserved, no upfront
Size48 vCPUs, 192 GiB24 vCPUs, 192 GiB
Architecturearm64x86_64

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.m8i.12xlargedb.m8i.12xlarge vs db.m8g.12xlarge
On-demandPay by the hour$4.032$4.49▲ 11%
1-yr reservedNo upfront33% off$2.70133% off$3.008▲ 11%
3-yr reservedNo upfront53% off$1.89553% off$2.11▲ 11%
1-yr savings planHourly commitment20% off$3.22620% off$3.592▲ 11%

Key differences

The biggest lead each one has.

Where db.m8g.12xlarge leads
On-demand price$4.032 vs $4.49 per hour
10% cheaper
vCPUs48 vs 24
2× higher
Where db.m8i.12xlarge leads
Sustained clock3.9 GHz vs 2.8 GHz
39% higher

Specs

14 of 24 specs differ. Those are in bold.

Compute7 of 8 differdb.m8g.12xlargedb.m8i.12xlarge
vCPUs4824
Physical cores4824
Threads per core12
Architecturearm64x86_64
Processor–Intel Xeon Scalable (Granite Rapids)
CPU makerAWSIntel
Sustained clock2.8 GHz3.9 GHz
BurstableNoNo
MemoryAll 1 matchdb.m8g.12xlargedb.m8i.12xlarge
Memory (GiB)192192
Networking1 of 3 differdb.m8g.12xlargedb.m8i.12xlarge
Network–22500 Megabit
Network baseline22.5 Gbps22.5 Gbps
Network peak22.5 Gbps22.5 Gbps
Storage1 of 7 differdb.m8g.12xlargedb.m8i.12xlarge
Storage–EBS Only
EBS baseline bandwidth15,000 Mbps15,000 Mbps
EBS max bandwidth15,000 Mbps15,000 Mbps
EBS baseline throughput1,875 MB/s1,875 MB/s
EBS max throughput1,875 MB/s1,875 MB/s
EBS baseline IOPS60,00060,000
EBS max IOPS60,00060,000
Instance details4 of 4 differdb.m8g.12xlargedb.m8i.12xlarge
Familym8gm8i
Category–General purpose
Current generation–Yes
Normalization factor96–
Other1 of 1 differdb.m8g.12xlargedb.m8i.12xlarge
Hardware Basism8g.12xlargem8i.12xlarge

On-demand prices by region

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

Regiondb.m8g.12xlargedb.m8i.12xlargeDifference
US East (N. Virginia)Used in summaryus-east-1$4.032$4.49▲ 11%
US East (Ohio)us-east-2$4.032$4.49▲ 11%
US West (Oregon)us-west-2$4.032$4.49▲ 11%
EU (Ireland)eu-west-1$4.464$4.964▲ 11%
Europe (Spain)eu-south-2$4.464$4.96▲ 11%
Canada West (Calgary)ca-west-1$4.467$4.94▲ 11%
US West (N. California)us-west-1$4.608$5.12▲ 11%
EU (London)eu-west-2$4.68$5.191▲ 11%
EU (Paris)eu-west-3$4.68$5.19▲ 11%
Asia Pacific (Malaysia)ap-southeast-5$4.776$5.56▲ 16%
EU (Frankfurt)eu-central-1$4.80$5.34▲ 11%
Africa (Cape Town)af-south-1$5.321$5.95▲ 12%
Asia Pacific (Tokyo)ap-northeast-1$5.616$6.22▲ 11%
Asia Pacific (Singapore)ap-southeast-1$5.621$6.22▲ 11%
Asia Pacific (Sydney)ap-southeast-2$5.621$6.22▲ 11%
Asia Pacific (Seoul)ap-northeast-2$5.626$6.22▲ 11%
Asia Pacific (Mumbai)ap-south-1$5.748$6.38▲ 11%
Asia Pacific (Hyderabad)ap-south-2$5.76$6.38▲ 11%
South America (Sao Paulo)sa-east-1$6.411$5.87▼ 8%

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

Compare db.m8i.12xlarge with

db.r8i.12xlargedb.m8a.12xlargedb.m7i.12xlarge

Pay the committed rate, with commitment protection

The best committed rate on these two is 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.