db.m8g.xlargevsdb.m8i.xlarge

db.m8g.xlarge is 9% cheaper than db.m8i.xlarge on demand in US East (N. Virginia), saving $24.82 a month. 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.xlargedb.m8i.xlarge
On-demand$0.336/hr9% less$0.37/hr
Lowest rate$0.1579/hr9% less3-yr reserved, no upfront$0.1739/hr3-yr reserved, no upfront
Size4 vCPUs, 16 GiB4 vCPUs, 16 GiB
ProcessorAWS Graviton4Intel Xeon Scalable (Granite Rapids)
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.xlargedb.m8i.xlargedb.m8i.xlarge vs db.m8g.xlarge
On-demandPay by the hour$0.336$0.37▲ 10%
1-yr reservedNo upfront33% off$0.22533% off$0.2479▲ 10%
3-yr reservedNo upfront53% off$0.157953% off$0.1739▲ 10%
1-yr savings planHourly commitment20% off$0.268820% off$0.296▲ 10%

Key differences

The biggest lead each one has.

Where db.m8g.xlarge leads
On-demand price$0.336 vs $0.37 per hour
9% cheaper
Physical cores4 vs 2
2× higher
Where db.m8i.xlarge leads
Sustained clock3.9 GHz vs 2.8 GHz
39% higher

Specs

10 of 24 specs differ. Those are in bold.

Compute6 of 8 differdb.m8g.xlargedb.m8i.xlarge
vCPUs44
Physical cores42
Threads per core12
Architecturearm64x86_64
ProcessorAWS Graviton4Intel Xeon Scalable (Granite Rapids)
CPU makerAWSIntel
Sustained clock2.8 GHz3.9 GHz
BurstableNoNo
MemoryAll 1 matchdb.m8g.xlargedb.m8i.xlarge
Memory (GiB)1616
Networking1 of 3 differdb.m8g.xlargedb.m8i.xlarge
NetworkUp to 12.5 GigabitUp to 12500 Megabit
Network baseline1.875 Gbps1.875 Gbps
Network peak12.5 Gbps12.5 Gbps
StorageAll 7 matchdb.m8g.xlargedb.m8i.xlarge
StorageEBS OnlyEBS Only
EBS baseline bandwidth1,250 Mbps1,250 Mbps
EBS max bandwidth10,000 Mbps10,000 Mbps
EBS baseline throughput156.25 MB/s156.25 MB/s
EBS max throughput1,250 MB/s1,250 MB/s
EBS baseline IOPS6,0006,000
EBS max IOPS40,00040,000
Instance details2 of 4 differdb.m8g.xlargedb.m8i.xlarge
Familym8gm8i
CategoryGeneral purposeGeneral purpose
Current generationYesYes
Normalization factor16–
Other1 of 1 differdb.m8g.xlargedb.m8i.xlarge
Hardware Basism8g.xlargem8i.xlarge

On-demand prices by region

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

Regiondb.m8g.xlargedb.m8i.xlargeDifference
US East (N. Virginia)Used in summaryus-east-1$0.336$0.37▲ 10%
US East (Ohio)us-east-2$0.336$0.37▲ 10%
US West (Oregon)us-west-2$0.336$0.37▲ 10%
Canada West (Calgary)ca-west-1$0.372$0.41▲ 10%
EU (Ireland)eu-west-1$0.372$0.414▲ 11%
Europe (Spain)eu-south-2$0.372$0.41▲ 10%
US West (N. California)us-west-1$0.384$0.43▲ 12%
EU (London)eu-west-2$0.39$0.433▲ 11%
EU (Paris)eu-west-3$0.39$0.43▲ 10%
Asia Pacific (Malaysia)ap-southeast-5$0.398$0.46▲ 16%
EU (Frankfurt)eu-central-1$0.4$0.45▲ 12%
Africa (Cape Town)af-south-1$0.443$0.5▲ 13%
Asia Pacific (Singapore)ap-southeast-1$0.468$0.52▲ 11%
Asia Pacific (Sydney)ap-southeast-2$0.468$0.52▲ 11%
Asia Pacific (Tokyo)ap-northeast-1$0.468$0.52▲ 11%
Asia Pacific (Seoul)ap-northeast-2$0.4688$0.52▲ 11%
Asia Pacific (Mumbai)ap-south-1$0.479$0.53▲ 11%
Asia Pacific (Hyderabad)ap-south-2$0.48$0.53▲ 10%
South America (Sao Paulo)sa-east-1$0.5342$0.49▼ 8%

Keep exploring

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

db.m8g.xlargeGeneral purpose, m8g family
db.m8g.xlarge prices and specsEvery size in the m8g family

Compare db.m8g.xlarge with

db.t4g.xlargedb.r8g.xlargedb.m8a.xlargedb.m8gd.xlargedb.m7g.xlargedb.m9g.xlarge
db.m8i.xlargeGeneral purpose, m8i family
db.m8i.xlarge prices and specsEvery size in the m8i family

Compare db.m8i.xlarge with

db.r8i.xlargedb.t3.xlargedb.m8a.xlargedb.t2.xlargedb.m7i.xlarge

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.

Connect AWS account

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