Drive comparison
ST20000NM002E vs ST20000NM003D
Seagate Exos X22 20TB and Seagate Exos X20 20TB, compared using published manufacturer specifications.
Seagate
Exos X22 20TB
ST20000NM002E
SAS 12 Gb/s · 3.5-inch
No verified exact-model Amazon listing yet.
Full specifications & all listings →
Seagate
Exos X20 20TB
ST20000NM003D
12 Gb/s SAS · 3.5-inch
$699.00
Amazon US · Used / renewed listing ↗ASIN B0CT1M6YXQ · as of Sep 12, 2026 10:53 UTC
Full specifications & all listings →As an Amazon Associate I earn from qualifying purchases. Match the selected variant, condition and seller terms before ordering.
What differs between these models?
- Interface: ST20000NM002E lists SAS 12 Gb/s; ST20000NM003D lists 12 Gb/s SAS.
A larger cache, higher RPM or higher advertised sequential speed alone does not establish which drive is better for your workload.
Specifications side by side
| Specification | ST20000NM002E | ST20000NM003D |
|---|---|---|
| Manufacturer | Seagate | Seagate |
| Product family | Exos X22 | Exos X20 |
| Model number | ST20000NM002E | ST20000NM003D |
| Capacity (TB) | 20 | 20 |
| RPM | 7200 | Not recorded |
| Interface | SAS 12 Gb/s | 12 Gb/s SAS |
| Cache (MB) | 512 | Not recorded |
| Form factor | 3.5-inch | 3.5-inch |
| Average idle power (W) | 5.5 | Not recorded |
| Power-on hours per year | 8760 | Not recorded |
| Manufacturer limited warranty | 5 years (eligible new drives) | 5 years (eligible new drives) |
| Sustained transfer (up to MB/s) | 285 | Not recorded |
| FIPS | Not recorded | No |
Compatibility and buying checks
- A SAS drive requires a compatible SAS controller or backplane. A normal motherboard SATA port cannot operate a SAS drive.
- Compare new and renewed offers separately. The manufacturer specification does not guarantee the warranty or return policy of a marketplace seller.
Manufacturer sources
ST20000NM002E
Seagate Exos X22 manufacturer specifications ↗ · pages 2
Reviewed 2026-09-07. Published specifications; no independent benchmark or failure-rate claim.
ST20000NM003D
Seagate Exos X20 manufacturer specifications ↗
Reviewed 2026-09-07. Published specifications; no independent benchmark or failure-rate claim.