Drive comparison
ST12000NM002H vs WD122KFBX
Seagate Exos X24 12TB and Western Digital WD Red Pro 12TB, compared using published manufacturer specifications.
Seagate
Exos X24 12TB
ST12000NM002H
SATA 6 Gb/s · 3.5-inch
$515.99
Amazon US · New listing ↗ASIN B0CN5KRQKL · as of Sep 12, 2026 11:43 UTC
Full specifications & all listings →Western Digital
WD Red Pro 12TB
WD122KFBX
SATA 6Gb/s · 3.5-inch
Check current Amazon price
Amazon US · Used / renewed listing ↗ASIN B0FGY75FTX
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: ST12000NM002H lists SATA 6 Gb/s; WD122KFBX lists SATA 6Gb/s.
- Sustained transfer (up to MB/s): ST12000NM002H lists 285; WD122KFBX lists 267.
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 | ST12000NM002H | WD122KFBX |
|---|---|---|
| Manufacturer | Seagate | Western Digital |
| Product family | Exos X24 | WD Red Pro |
| Model number | ST12000NM002H | WD122KFBX |
| Capacity (TB) | 12 | 12 |
| RPM | 7200 | 7200 |
| Interface | SATA 6 Gb/s | SATA 6Gb/s |
| Cache (MB) | 512 | 512 |
| Form factor | 3.5-inch | 3.5-inch |
| Average idle power (W) | 6.3 | 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 | 267 |
| Recording | Not recorded | CMR |
| Workload rating (TB/year) | Not recorded | 550 |
| Physical sector size (bytes) | Not recorded | 4096 |
Compatibility and buying checks
- Compare new and renewed offers separately. The manufacturer specification does not guarantee the warranty or return policy of a marketplace seller.
Manufacturer sources
ST12000NM002H
Seagate Exos X24 manufacturer specifications ↗ · pages 2
Reviewed 2026-09-07. Published specifications; no independent benchmark or failure-rate claim.
WD122KFBX
Western Digital WD Red Pro manufacturer datasheet ↗
Reviewed 2026-08-21. Published specifications; no independent benchmark or failure-rate claim.