db.m8a.8xlargevsdb.m8i.8xlarge
db.m8i.8xlarge is 13% cheaper than db.m8a.8xlarge on demand in US East (N. Virginia), saving $327.33 a month. Per vCPU, db.m8a.8xlarge costs 43% less.
| At a glance | db.m8a.8xlarge | db.m8i.8xlarge |
|---|---|---|
| On-demand | $3.438/hr | $2.99/hr13% less |
| Lowest rate | $2.751/hr1-yr savings plan, hourly commitment | $2.392/hr13% less1-yr savings plan, hourly commitment |
| Size | 32 vCPUs, 128 GiB | 16 vCPUs, 128 GiB |
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.8xlarge | db.m8i.8xlarge | db.m8i.8xlarge vs db.m8a.8xlarge |
|---|---|---|---|
| On-demandPay by the hour | $3.438 | $2.99 | ▼ 13% |
| 1-yr reservedNo upfront | — | 33% off$2.003 | — |
| 3-yr reservedNo upfront | — | 53% off$1.405 | — |
| 1-yr savings planHourly commitment | 20% off$2.751 | 20% off$2.392 | ▼ 13% |
Key differences
The biggest lead each one has.
Where db.m8a.8xlarge leads
vCPUs32 vs 16
2× higherWhere db.m8i.8xlarge leads
On-demand price$2.99 vs $3.438 per hour
13% cheaperSpecs
13 of 23 specs differ. Those are in bold.
| Compute7 of 8 differ | db.m8a.8xlarge | db.m8i.8xlarge |
|---|---|---|
| vCPUs | 32 | 16 |
| Physical cores | 32 | 16 |
| Threads per core | 1 | 2 |
| Architecture | – | x86_64 |
| Processor | – | Intel Xeon Scalable (Granite Rapids) |
| CPU maker | AMD | Intel |
| Sustained clock | 4.5 GHz | 3.9 GHz |
| Burstable | No | No |
| MemoryAll 1 match | db.m8a.8xlarge | db.m8i.8xlarge |
|---|---|---|
| Memory (GiB) | 128 | 128 |
| Networking1 of 3 differ | db.m8a.8xlarge | db.m8i.8xlarge |
|---|---|---|
| Network | – | 15000 Megabit |
| Network baseline | 15 Gbps | 15 Gbps |
| Network peak | 15 Gbps | 15 Gbps |
| Storage1 of 7 differ | db.m8a.8xlarge | db.m8i.8xlarge |
|---|---|---|
| Storage | – | EBS Only |
| EBS baseline bandwidth | 10,000 Mbps | 10,000 Mbps |
| EBS max bandwidth | 10,000 Mbps | 10,000 Mbps |
| EBS baseline throughput | 1,250 MB/s | 1,250 MB/s |
| EBS max throughput | 1,250 MB/s | 1,250 MB/s |
| EBS baseline IOPS | 40,000 | 40,000 |
| EBS max IOPS | 40,000 | 40,000 |
| Instance details3 of 3 differ | db.m8a.8xlarge | db.m8i.8xlarge |
|---|---|---|
| Family | m8a | m8i |
| Category | – | General purpose |
| Current generation | – | Yes |
| Other1 of 1 differ | db.m8a.8xlarge | db.m8i.8xlarge |
|---|---|---|
| Hardware Basis | m8a.8xlarge | m8i.8xlarge |
On-demand prices by region
Cheapest for db.m8a.8xlarge first. PostgreSQL, USD per hour.
| Region | db.m8a.8xlarge | db.m8i.8xlarge | Difference |
|---|---|---|---|
| US East (N. Virginia)Used in summaryus-east-1 | $3.438 | $2.99 | ▼ 13% |
| US East (Ohio)us-east-2 | $3.438 | $2.99 | ▼ 13% |
| US West (Oregon)us-west-2 | $3.438 | $2.99 | ▼ 13% |
| EU (Ireland)eu-west-1 | $3.806 | $3.31 | ▼ 13% |
| Europe (Spain)eu-south-2 | $3.806 | $3.31 | ▼ 13% |
| EU (Frankfurt)eu-central-1 | $4.096 | $3.56 | ▼ 13% |
| Asia Pacific (Tokyo)ap-northeast-1 | $4.773 | $4.15 | ▼ 13% |
| Asia Pacific (Hyderabad)ap-south-2 | $4.89 | $4.25 | ▼ 13% |
| Asia Pacific (Mumbai)ap-south-1 | $4.89 | $4.25 | ▼ 13% |
Keep exploring
Each type’s own page, and how it compares with others.
db.m8a.8xlarge
db.m8a.8xlarge prices and specsEvery size in the m8a familyCompare db.m8a.8xlarge with
db.m8i.8xlarge
db.m8i.8xlarge prices and specsEvery size in the m8i familyCompare db.m8i.8xlarge with
AWS RDS PostgreSQL prices in USD. Monthly figures use 730 hours. Prices last updated 12 Nov 2026.