db.m8g.4xlargevsdb.m9g.4xlarge
db.m8g.4xlarge is 8% cheaper than db.m9g.4xlarge on demand in US East (N. Virginia), saving $88.33 a month.
| At a glance | db.m8g.4xlarge | db.m9g.4xlarge |
|---|---|---|
| On-demand | $1.344/hr8% less | $1.465/hr |
| Lowest rate | $1.075/hr8% less1-yr savings plan, hourly commitment | $1.172/hr1-yr savings plan, hourly commitment |
| Size | 16 vCPUs, 64 GiB | 16 vCPUs, 64 GiB |
| Architecture | arm64 | arm64 |
Prices in US East (N. Virginia)
“Off” is the discount against each type’s own on-demand price. PostgreSQL, USD per hour.
| Option | db.m8g.4xlarge | db.m9g.4xlarge | db.m9g.4xlarge vs db.m8g.4xlarge |
|---|---|---|---|
| On-demandPay by the hour | $1.344 | $1.465 | ▲ 9% |
| 1-yr reservedNo upfront | 33% off$0.9 | — | — |
| 3-yr reservedNo upfront | 53% off$0.6316 | — | — |
| 1-yr savings planHourly commitment | 20% off$1.075 | 20% off$1.172 | ▲ 9% |
Key differences
The biggest lead each one has.
Where db.m8g.4xlarge leads
On-demand price$1.344 vs $1.465 per hour
8% cheaperWhere db.m9g.4xlarge leads
EBS baseline bandwidth6,000 Mbps vs 5,000 Mbps
20% higherSustained clock3.3 GHz vs 2.8 GHz
18% higherNetwork baseline8.5 Gbps vs 7.5 Gbps
13% higherSpecs
17 of 24 specs differ. Those are in bold.
| Compute2 of 8 differ | db.m8g.4xlarge | db.m9g.4xlarge |
|---|---|---|
| vCPUs | 16 | 16 |
| Physical cores | 16 | 16 |
| Threads per core | 1 | 1 |
| Architecture | arm64 | arm64 |
| Processor | AWS Graviton4 | – |
| CPU maker | AWS | AWS |
| Sustained clock | 2.8 GHz | 3.3 GHz |
| Burstable | No | No |
| MemoryAll 1 match | db.m8g.4xlarge | db.m9g.4xlarge |
|---|---|---|
| Memory (GiB) | 64 | 64 |
| Networking3 of 3 differ | db.m8g.4xlarge | db.m9g.4xlarge |
|---|---|---|
| Network | Up to 15 Gigabit | – |
| Network baseline | 7.5 Gbps | 8.5 Gbps |
| Network peak | 15 Gbps | 17 Gbps |
| Storage7 of 7 differ | db.m8g.4xlarge | db.m9g.4xlarge |
|---|---|---|
| Storage | EBS Only | – |
| EBS baseline bandwidth | 5,000 Mbps | 6,000 Mbps |
| EBS max bandwidth | 10,000 Mbps | 12,000 Mbps |
| EBS baseline throughput | 625 MB/s | 750 MB/s |
| EBS max throughput | 1,250 MB/s | 1,500 MB/s |
| EBS baseline IOPS | 20,000 | 24,000 |
| EBS max IOPS | 40,000 | 48,000 |
| Instance details4 of 4 differ | db.m8g.4xlarge | db.m9g.4xlarge |
|---|---|---|
| Family | m8g | m9g |
| Category | General purpose | – |
| Current generation | Yes | – |
| Normalization factor | 64 | 32 |
| Other1 of 1 differ | db.m8g.4xlarge | db.m9g.4xlarge |
|---|---|---|
| Hardware Basis | m8g.4xlarge | m9g.4xlarge |
On-demand prices by region
Cheapest for db.m8g.4xlarge first. PostgreSQL, USD per hour.
| Region | db.m8g.4xlarge | db.m9g.4xlarge | Difference |
|---|---|---|---|
| US East (N. Virginia)Used in summaryus-east-1 | $1.344 | $1.465 | ▲ 9% |
| US East (Ohio)us-east-2 | $1.344 | $1.465 | ▲ 9% |
| US West (Oregon)us-west-2 | $1.344 | $1.465 | ▲ 9% |
| EU (Frankfurt)eu-central-1 | $1.60 | $1.744 | ▲ 9% |
Keep exploring
Each type’s own page, and how it compares with others.
db.m8g.4xlarge
db.m8g.4xlarge prices and specsEvery size in the m8g familyCompare db.m8g.4xlarge with
AWS RDS PostgreSQL prices in USD. Monthly figures use 730 hours. Prices last updated 12 Nov 2026.