Drive comparison
ST12000NM005H vs ST12000NM008G
Seagate Exos X24 12TB and Seagate Exos X16 12TB, compared using published manufacturer specifications.
Seagate
Exos X24 12TB
ST12000NM005H
SAS 12 Gb/s · 3.5-inch
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Full specifications & all listings →Seagate
Exos X16 12TB
ST12000NM008G
SAS 12 Gb/s · 3.5-inch
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What differs between these models?
- Cache (MB): ST12000NM005H lists 512; ST12000NM008G lists 256.
- Average idle power (W): ST12000NM005H lists 6.5; ST12000NM008G lists 5.
- Sustained transfer (up to MB/s): ST12000NM005H lists 285; ST12000NM008G lists 233.
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 | ST12000NM005H | ST12000NM008G |
|---|---|---|
| Manufacturer | Seagate | Seagate |
| Product family | Exos X24 | Exos X16 |
| Model number | ST12000NM005H | ST12000NM008G |
| Capacity (TB) | 12 | 12 |
| RPM | 7200 | 7200 |
| Interface | SAS 12 Gb/s | SAS 12 Gb/s |
| Cache (MB) | 512 | 256 |
| Form factor | 3.5-inch | 3.5-inch |
| Average idle power (W) | 6.5 | 5 |
| Power-on hours per year | 8760 | 8760 |
| Manufacturer limited warranty | 5 years (eligible new drives) | 5 years (eligible new drives) |
| Sustained transfer (up to MB/s) | 285 | 233 |
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
ST12000NM005H
Seagate Exos X24 manufacturer specifications ↗ · pages 3
Reviewed 2026-09-07. Published specifications; no independent benchmark or failure-rate claim.
ST12000NM008G
Seagate Exos X16 manufacturer specifications ↗ · pages 3
Reviewed 2026-09-07. Published specifications; no independent benchmark or failure-rate claim.