# Amazon RDS Memory-optimized (X-family) 4xlarge instances compared

> Compare all 2 Amazon RDS Memory-optimized (X-family) 4xlarge instances — monthly price across regions and engines, side by side.

Source: https://www.bytebase.com/dbcost/rds/compare/x-4xlarge/

---

Pricing below is for US East (N. Virginia) (us-east-1); other regions, engines are on the page.

## PostgreSQL (us-east-1)

| Instance | vCPU | RAM (GB) | On-Demand | 1-yr Reserved | 3-yr Reserved |
|---|---|---|---|---|---|
| db.x2g.4xlarge | 16 | 256 | $1,904 | $1,028 | $685 |
| db.x2iedn.4xlarge | 16 | 512 | $5,554 | — | — |

## MySQL (us-east-1)

| Instance | vCPU | RAM (GB) | On-Demand | 1-yr Reserved | 3-yr Reserved |
|---|---|---|---|---|---|
| db.x2g.4xlarge | 16 | 256 | $1,904 | $1,028 | $685 |
| db.x2iedn.4xlarge | 16 | 512 | $5,554 | $4,734 | $3,437 |

## MariaDB (us-east-1)

| Instance | vCPU | RAM (GB) | On-Demand | 1-yr Reserved | 3-yr Reserved |
|---|---|---|---|---|---|
| db.x2g.4xlarge | 16 | 256 | $1,904 | $1,028 | $685 |
| db.x2iedn.4xlarge | 16 | 512 | $5,554 | $4,734 | $3,437 |