db.m8g.2xlargevsdb.m8i.2xlarge

db.m8g.2xlarge is 10% cheaper than db.m8i.2xlarge on demand in US East (N. Virginia), saving $56.94 a month. Per vCPU, db.m8g.2xlarge 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.2xlargedb.m8i.2xlarge
On-demand$0.672/hr10% less$0.75/hr
Lowest rate$0.3158/hr10% less3-yr reserved, no upfront$0.3525/hr3-yr reserved, no upfront
Size8 vCPUs, 32 GiB4 vCPUs, 32 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.2xlargedb.m8i.2xlargedb.m8i.2xlarge vs db.m8g.2xlarge
On-demandPay by the hour$0.672$0.75▲ 12%
1-yr reservedNo upfront33% off$0.4533% off$0.5025▲ 12%
3-yr reservedNo upfront53% off$0.315853% off$0.3525▲ 12%
1-yr savings planHourly commitment20% off$0.537620% off$0.6▲ 12%

Key differences

The biggest lead each one has.

Where db.m8g.2xlarge leads
On-demand price$0.672 vs $0.75 per hour
10% cheaper
vCPUs8 vs 4
2× higher
Where db.m8i.2xlarge leads
Sustained clock3.9 GHz vs 2.8 GHz
39% higher

Specs

11 of 24 specs differ. Those are in bold.

Compute7 of 8 differdb.m8g.2xlargedb.m8i.2xlarge
vCPUs84
Physical cores84
Threads per core12
Architecturearm64x86_64
ProcessorAWS Graviton4Intel Xeon Scalable (Granite Rapids)
CPU makerAWSIntel
Sustained clock2.8 GHz3.9 GHz
BurstableNoNo
MemoryAll 1 matchdb.m8g.2xlargedb.m8i.2xlarge
Memory (GiB)3232
Networking1 of 3 differdb.m8g.2xlargedb.m8i.2xlarge
NetworkUp to 15 GigabitUp to 15000 Megabit
Network baseline3.75 Gbps3.75 Gbps
Network peak15 Gbps15 Gbps
StorageAll 7 matchdb.m8g.2xlargedb.m8i.2xlarge
StorageEBS OnlyEBS Only
EBS baseline bandwidth2,500 Mbps2,500 Mbps
EBS max bandwidth10,000 Mbps10,000 Mbps
EBS baseline throughput312.5 MB/s312.5 MB/s
EBS max throughput1,250 MB/s1,250 MB/s
EBS baseline IOPS12,00012,000
EBS max IOPS40,00040,000
Instance details2 of 4 differdb.m8g.2xlargedb.m8i.2xlarge
Familym8gm8i
CategoryGeneral purposeGeneral purpose
Current generationYesYes
Normalization factor16–
Other1 of 1 differdb.m8g.2xlargedb.m8i.2xlarge
Hardware Basism8g.2xlargem8i.2xlarge

On-demand prices by region

Cheapest for db.m8g.2xlarge first. PostgreSQL, USD per hour.

Regiondb.m8g.2xlargedb.m8i.2xlargeDifference
US East (N. Virginia)Used in summaryus-east-1$0.672$0.75▲ 12%
US East (Ohio)us-east-2$0.672$0.75▲ 12%
US West (Oregon)us-west-2$0.672$0.75▲ 12%
Canada West (Calgary)ca-west-1$0.744$0.82▲ 10%
EU (Ireland)eu-west-1$0.744$0.827▲ 11%
Europe (Spain)eu-south-2$0.744$0.83▲ 12%
US West (N. California)us-west-1$0.768$0.85▲ 11%
EU (London)eu-west-2$0.78$0.865▲ 11%
EU (Paris)eu-west-3$0.78$0.87▲ 12%
Asia Pacific (Malaysia)ap-southeast-5$0.796$0.93▲ 17%
EU (Frankfurt)eu-central-1$0.8$0.89▲ 11%
Africa (Cape Town)af-south-1$0.887$0.99▲ 12%
Asia Pacific (Tokyo)ap-northeast-1$0.936$1.04▲ 11%
Asia Pacific (Singapore)ap-southeast-1$0.937$1.04▲ 11%
Asia Pacific (Sydney)ap-southeast-2$0.937$1.04▲ 11%
Asia Pacific (Seoul)ap-northeast-2$0.9376$1.04▲ 11%
Asia Pacific (Mumbai)ap-south-1$0.958$1.06▲ 11%
Asia Pacific (Hyderabad)ap-south-2$0.96$1.06▲ 10%
South America (Sao Paulo)sa-east-1$1.069$0.98▼ 8%

Keep exploring

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

db.m8g.2xlargeGeneral purpose, m8g family
db.m8g.2xlarge prices and specsEvery size in the m8g family

Compare db.m8g.2xlarge with

db.t4g.2xlargedb.r8g.2xlargedb.m8a.2xlargedb.m8gd.2xlargedb.m7g.2xlargedb.m9g.2xlarge
db.m8i.2xlargeGeneral purpose, m8i family
db.m8i.2xlarge prices and specsEvery size in the m8i family

Compare db.m8i.2xlarge with

db.r8i.2xlargedb.m8a.2xlargedb.m7i.2xlarge

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.