db.m8g.16xlargevsdb.m9g.16xlarge

db.m8g.16xlarge is 8% cheaper than db.m9g.16xlarge on demand in US East (N. Virginia), saving $353.32 a month.

At a glancedb.m8g.16xlargedb.m9g.16xlarge
On-demand$5.376/hr8% less$5.86/hr
Lowest rate$4.301/hr8% less1-yr savings plan, hourly commitment$4.688/hr1-yr savings plan, hourly commitment
Size64 vCPUs, 256 GiB64 vCPUs, 256 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.16xlargedb.m9g.16xlargedb.m9g.16xlarge vs db.m8g.16xlarge
On-demandPay by the hour$5.376$5.86▲ 9%
1-yr reservedNo upfront33% off$3.602——
3-yr reservedNo upfront53% off$2.527——
1-yr savings planHourly commitment20% off$4.30120% off$4.688▲ 9%

Key differences

The biggest lead each one has.

Where db.m8g.16xlarge leads
On-demand price$5.376 vs $5.86 per hour
8% cheaper
Where db.m9g.16xlarge leads
EBS baseline bandwidth24,000 Mbps vs 20,000 Mbps
20% higher
Sustained clock3.3 GHz vs 2.8 GHz
18% higher
Network baseline34 Gbps vs 30 Gbps
13% higher

Specs

11 of 19 specs differ. Those are in bold.

Compute1 of 7 differdb.m8g.16xlargedb.m9g.16xlarge
vCPUs6464
Physical cores6464
Threads per core11
Architecturearm64arm64
CPU makerAWSAWS
Sustained clock2.8 GHz3.3 GHz
BurstableNoNo
MemoryAll 1 matchdb.m8g.16xlargedb.m9g.16xlarge
Memory (GiB)256256
Networking2 of 2 differdb.m8g.16xlargedb.m9g.16xlarge
Network baseline30 Gbps34 Gbps
Network peak30 Gbps34 Gbps
Storage6 of 6 differdb.m8g.16xlargedb.m9g.16xlarge
EBS baseline bandwidth20,000 Mbps24,000 Mbps
EBS max bandwidth20,000 Mbps24,000 Mbps
EBS baseline throughput2,500 MB/s3,000 MB/s
EBS max throughput2,500 MB/s3,000 MB/s
EBS baseline IOPS80,00096,000
EBS max IOPS80,00096,000
Instance details1 of 2 differdb.m8g.16xlargedb.m9g.16xlarge
Familym8gm9g
Normalization factor128128
Other1 of 1 differdb.m8g.16xlargedb.m9g.16xlarge
Hardware Basism8g.16xlargem9g.16xlarge

On-demand prices by region

Cheapest for db.m8g.16xlarge first. PostgreSQL, USD per hour.

Regiondb.m8g.16xlargedb.m9g.16xlargeDifference
US East (N. Virginia)Used in summaryus-east-1$5.376$5.86▲ 9%
US East (Ohio)us-east-2$5.376$5.86▲ 9%
US West (Oregon)us-west-2$5.376$5.86▲ 9%
EU (Frankfurt)eu-central-1$6.40$6.976▲ 9%

Keep exploring

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

db.m8g.16xlargem8g family
db.m8g.16xlarge prices and specsEvery size in the m8g family

Compare db.m8g.16xlarge with

db.m8i.16xlargedb.r8g.16xlargedb.m8a.16xlargedb.m8gd.16xlargedb.m7g.16xlarge
db.m9g.16xlargem9g family
db.m9g.16xlarge 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.