db.m8g.8xlargevsdb.m9g.8xlarge

db.m8g.8xlarge is 8% cheaper than db.m9g.8xlarge on demand in US East (N. Virginia), saving $176.66 a month.

At a glancedb.m8g.8xlargedb.m9g.8xlarge
On-demand$2.688/hr8% less$2.93/hr
Lowest rate$2.15/hr8% less1-yr savings plan, hourly commitment$2.344/hr1-yr savings plan, hourly commitment
Size32 vCPUs, 128 GiB32 vCPUs, 128 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.8xlargedb.m9g.8xlargedb.m9g.8xlarge vs db.m8g.8xlarge
On-demandPay by the hour$2.688$2.93▲ 9%
1-yr reservedNo upfront33% off$1.801——
3-yr reservedNo upfront53% off$1.263——
1-yr savings planHourly commitment20% off$2.1520% off$2.344▲ 9%

Key differences

The biggest lead each one has.

Where db.m8g.8xlarge leads
On-demand price$2.688 vs $2.93 per hour
8% cheaper
Where db.m9g.8xlarge leads
EBS baseline bandwidth12,000 Mbps vs 10,000 Mbps
20% higher
Sustained clock3.3 GHz vs 2.8 GHz
18% higher
Network baseline17 Gbps vs 15 Gbps
13% higher

Specs

11 of 19 specs differ. Those are in bold.

Compute1 of 7 differdb.m8g.8xlargedb.m9g.8xlarge
vCPUs3232
Physical cores3232
Threads per core11
Architecturearm64arm64
CPU makerAWSAWS
Sustained clock2.8 GHz3.3 GHz
BurstableNoNo
MemoryAll 1 matchdb.m8g.8xlargedb.m9g.8xlarge
Memory (GiB)128128
Networking2 of 2 differdb.m8g.8xlargedb.m9g.8xlarge
Network baseline15 Gbps17 Gbps
Network peak15 Gbps17 Gbps
Storage6 of 6 differdb.m8g.8xlargedb.m9g.8xlarge
EBS baseline bandwidth10,000 Mbps12,000 Mbps
EBS max bandwidth10,000 Mbps12,000 Mbps
EBS baseline throughput1,250 MB/s1,500 MB/s
EBS max throughput1,250 MB/s1,500 MB/s
EBS baseline IOPS40,00048,000
EBS max IOPS40,00048,000
Instance details1 of 2 differdb.m8g.8xlargedb.m9g.8xlarge
Familym8gm9g
Normalization factor6464
Other1 of 1 differdb.m8g.8xlargedb.m9g.8xlarge
Hardware Basism8g.8xlargem9g.8xlarge

On-demand prices by region

Cheapest for db.m8g.8xlarge first. PostgreSQL, USD per hour.

Regiondb.m8g.8xlargedb.m9g.8xlargeDifference
US East (N. Virginia)Used in summaryus-east-1$2.688$2.93▲ 9%
US East (Ohio)us-east-2$2.688$2.93▲ 9%
US West (Oregon)us-west-2$2.688$2.93▲ 9%
EU (Frankfurt)eu-central-1$3.20$3.488▲ 9%

Keep exploring

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

db.m8g.8xlargem8g family
db.m8g.8xlarge prices and specsEvery size in the m8g family

Compare db.m8g.8xlarge with

db.m8i.8xlargedb.r8g.8xlargedb.m8a.8xlargedb.m8gd.8xlargedb.m7g.8xlarge
db.m9g.8xlargem9g family
db.m9g.8xlarge 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.

Connect AWS account

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