db.m8a.16xlargevsdb.m8g.16xlarge
db.m8g.16xlarge is 22% cheaper than db.m8a.16xlarge on demand in US East (N. Virginia), saving $1,095.58 a month. Per vCPU, db.m8g.16xlarge costs 61% less. They use different processor architectures (x86_64 and arm64), so software built for one may need rebuilding to run on the other.
| At a glance | db.m8a.16xlarge | db.m8g.16xlarge |
|---|---|---|
| On-demand | $6.877/hr | $5.376/hr22% less |
| Lowest rate | $5.501/hr1-yr savings plan, hourly commitment | $4.301/hr22% less1-yr savings plan, hourly commitment |
| Size | 32 vCPUs, 256 GiB | 64 vCPUs, 256 GiB |
| Architecture | x86_64 | 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.m8a.16xlarge | db.m8g.16xlarge | db.m8g.16xlarge vs db.m8a.16xlarge |
|---|---|---|---|
| On-demandPay by the hour | $6.877 | $5.376 | ▼ 22% |
| 1-yr reservedNo upfront | — | 33% off$3.602 | — |
| 3-yr reservedNo upfront | — | 53% off$2.527 | — |
| 1-yr savings planHourly commitment | 20% off$5.501 | 20% off$4.301 | ▼ 22% |
Key differences
The biggest lead each one has.
Where db.m8a.16xlarge leads
Sustained clock4.5 GHz vs 2.8 GHz
61% higherWhere db.m8g.16xlarge leads
On-demand price$5.376 vs $6.877 per hour
22% cheapervCPUs64 vs 32
2× higherSpecs
12 of 24 specs differ. Those are in bold.
| Compute5 of 8 differ | db.m8a.16xlarge | db.m8g.16xlarge |
|---|---|---|
| vCPUs | 32 | 64 |
| Physical cores | 64 | 64 |
| Threads per core | 1 | 1 |
| Architecture | x86_64 | arm64 |
| Processor | 5th Generation AMD EPYC | – |
| CPU maker | AMD | AWS |
| Sustained clock | 4.5 GHz | 2.8 GHz |
| Burstable | No | No |
| MemoryAll 1 match | db.m8a.16xlarge | db.m8g.16xlarge |
|---|---|---|
| Memory (GiB) | 256 | 256 |
| Networking1 of 3 differ | db.m8a.16xlarge | db.m8g.16xlarge |
|---|---|---|
| Network | 30000 Mbps | – |
| Network baseline | 30 Gbps | 30 Gbps |
| Network peak | 30 Gbps | 30 Gbps |
| Storage1 of 7 differ | db.m8a.16xlarge | db.m8g.16xlarge |
|---|---|---|
| Storage | EBS Only | – |
| EBS baseline bandwidth | 20,000 Mbps | 20,000 Mbps |
| EBS max bandwidth | 20,000 Mbps | 20,000 Mbps |
| EBS baseline throughput | 2,500 MB/s | 2,500 MB/s |
| EBS max throughput | 2,500 MB/s | 2,500 MB/s |
| EBS baseline IOPS | 80,000 | 80,000 |
| EBS max IOPS | 80,000 | 80,000 |
| Instance details4 of 4 differ | db.m8a.16xlarge | db.m8g.16xlarge |
|---|---|---|
| Family | m8a | m8g |
| Category | General purpose | – |
| Current generation | Yes | – |
| Normalization factor | – | 128 |
| Other1 of 1 differ | db.m8a.16xlarge | db.m8g.16xlarge |
|---|---|---|
| Hardware Basis | m8a.16xlarge | m8g.16xlarge |
On-demand prices by region
Cheapest for db.m8a.16xlarge first. PostgreSQL, USD per hour.
| Region | db.m8a.16xlarge | db.m8g.16xlarge | Difference |
|---|---|---|---|
| US East (N. Virginia)Used in summaryus-east-1 | $6.877 | $5.376 | ▼ 22% |
| US East (Ohio)us-east-2 | $6.877 | $5.376 | ▼ 22% |
| US West (Oregon)us-west-2 | $6.877 | $5.376 | ▼ 22% |
| EU (Ireland)eu-west-1 | $7.613 | $5.952 | ▼ 22% |
| Europe (Spain)eu-south-2 | $7.613 | $5.952 | ▼ 22% |
| EU (Frankfurt)eu-central-1 | $8.192 | $6.40 | ▼ 22% |
| Asia Pacific (Tokyo)ap-northeast-1 | $9.546 | $7.488 | ▼ 22% |
| Asia Pacific (Hyderabad)ap-south-2 | $9.779 | $7.68 | ▼ 21% |
| Asia Pacific (Mumbai)ap-south-1 | $9.779 | $7.664 | ▼ 22% |
Keep exploring
Each type’s own page, and how it compares with others.
db.m8a.16xlarge
db.m8a.16xlarge prices and specsEvery size in the m8a familyCompare db.m8a.16xlarge with
db.m8g.16xlarge
db.m8g.16xlarge prices and specsEvery size in the m8g familyCompare db.m8g.16xlarge with
AWS RDS PostgreSQL prices in USD. Monthly figures use 730 hours. Prices last updated 12 Nov 2026.