db.m8g.8xlargevsdb.r8g.8xlarge

db.m8g.8xlarge is 30% cheaper than db.r8g.8xlarge on demand in US East (N. Virginia), saving $829.28 a month.

At a glancedb.m8g.8xlargedb.r8g.8xlarge
On-demand$2.688/hr30% less$3.824/hr
Lowest rate$1.263/hr30% less3-yr reserved, no upfront$1.797/hr3-yr reserved, no upfront
Size32 vCPUs, 128 GiB32 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.8xlargedb.r8g.8xlargedb.r8g.8xlarge vs db.m8g.8xlarge
On-demandPay by the hour$2.688$3.824▲ 42%
1-yr reservedNo upfront33% off$1.80133% off$2.562▲ 42%
3-yr reservedNo upfront53% off$1.26353% off$1.797▲ 42%
1-yr savings planHourly commitment20% off$2.1520% off$3.059▲ 42%

Key differences

The biggest lead each one has.

Where db.m8g.8xlarge leads
On-demand price$2.688 vs $3.824 per hour
30% cheaper
Where db.r8g.8xlarge leads
Memory (GiB)256 vs 128
2× higher

Specs

9 of 24 specs differ. Those are in bold.

Compute1 of 8 differdb.m8g.8xlargedb.r8g.8xlarge
vCPUs3232
Physical cores3232
Threads per core11
Architecturearm64arm64
Processor–AWS Graviton4
CPU makerAWSAWS
Sustained clock2.8 GHz2.8 GHz
BurstableNoNo
Memory1 of 1 differdb.m8g.8xlargedb.r8g.8xlarge
Memory (GiB)128256
Networking1 of 3 differdb.m8g.8xlargedb.r8g.8xlarge
Network–15 Gigabit
Network baseline15 Gbps15 Gbps
Network peak15 Gbps15 Gbps
Storage1 of 7 differdb.m8g.8xlargedb.r8g.8xlarge
Storage–Aurora IO Optimization Mode
EBS baseline bandwidth10,000 Mbps10,000 Mbps
EBS max bandwidth10,000 Mbps10,000 Mbps
EBS baseline throughput1,250 MB/s1,250 MB/s
EBS max throughput1,250 MB/s1,250 MB/s
EBS baseline IOPS40,00040,000
EBS max IOPS40,00040,000
Instance details4 of 4 differdb.m8g.8xlargedb.r8g.8xlarge
Familym8gr8g
Category–Memory optimized
Current generation–Yes
Normalization factor6483.2
Other1 of 1 differdb.m8g.8xlargedb.r8g.8xlarge
Hardware Basism8g.8xlarger8g.8xlarge

On-demand prices by region

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

Regiondb.m8g.8xlargedb.r8g.8xlargeDifference
US East (N. Virginia)Used in summaryus-east-1$2.688$3.824▲ 42%
US East (Ohio)us-east-2$2.688$3.824▲ 42%
US West (Oregon)us-west-2$2.688$3.824▲ 42%
EU (Stockholm)eu-north-1$2.832$3.92▲ 38%
EU (Ireland)eu-west-1$2.976$4.288▲ 44%
Europe (Spain)eu-south-2$2.976$4.288▲ 44%
US West (N. California)us-west-1$3.072$4.288▲ 40%
EU (London)eu-west-2$3.12$4.488▲ 44%
EU (Paris)eu-west-3$3.12$4.487▲ 44%
Asia Pacific (Malaysia)ap-southeast-5$3.184$3.904▲ 23%
EU (Frankfurt)eu-central-1$3.20$4.656▲ 45%
Europe (Zurich)eu-central-2$3.536$5.12▲ 45%
Asia Pacific (Tokyo)ap-northeast-1$3.744$4.592▲ 23%
Asia Pacific (Singapore)ap-southeast-1$3.747$4.592▲ 23%
Asia Pacific (Sydney)ap-southeast-2$3.747$4.592▲ 23%
Asia Pacific (Seoul)ap-northeast-2$3.75$4.59▲ 22%
Asia Pacific (Mumbai)ap-south-1$3.832$4.352▲ 14%
Asia Pacific (Hyderabad)ap-south-2$3.84$4.352▲ 13%
Asia Pacific (Hong Kong)ap-east-1$4.128$5.05▲ 22%
South America (Sao Paulo)sa-east-1$4.274$6.08▲ 42%

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.m8a.8xlargedb.m8gd.8xlargedb.m7g.8xlargedb.m9g.8xlarge
db.r8g.8xlargeMemory optimized, r8g family
db.r8g.8xlarge prices and specsEvery size in the r8g family

Compare db.r8g.8xlarge with

db.r8gd.8xlargedb.r8i.8xlargedb.r8a.8xlargedb.r7g.8xlarge

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.