Drive comparison
ST16000NM004G vs ST16000NM004J
Seagate Exos X16 16TB and Seagate Exos X18 16TB, compared using published manufacturer specifications.
Seagate
Exos X16 16TB
ST16000NM004G
SAS 12 Gb/s · 3.5-inch
$690.52
Amazon US · New listing ↗ASIN B07T3VPKXK · as of Sep 12, 2026 10:56 UTC
Full specifications & all listings →
Seagate
Exos X18 16TB
ST16000NM004J
SAS 12 Gb/s · 3.5-inch
$744.45
Amazon US · New listing ↗ASIN B08Z3NCPK4 · as of Sep 12, 2026 11:46 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?
- Average idle power (W): ST16000NM004G lists 5; ST16000NM004J lists 5.5.
- Sustained transfer (up to MB/s): ST16000NM004G lists 249; ST16000NM004J lists 270.
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 | ST16000NM004G | ST16000NM004J |
|---|---|---|
| Manufacturer | Seagate | Seagate |
| Product family | Exos X16 | Exos X18 |
| Model number | ST16000NM004G | ST16000NM004J |
| Capacity (TB) | 16 | 16 |
| RPM | 7200 | 7200 |
| Interface | SAS 12 Gb/s | SAS 12 Gb/s |
| Cache (MB) | 256 | 256 |
| Form factor | 3.5-inch | 3.5-inch |
| Average idle power (W) | 5 | 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) | 249 | 270 |
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
ST16000NM004G
Seagate Exos X16 manufacturer specifications ↗ · pages 2
Reviewed 2026-09-07. Published specifications; no independent benchmark or failure-rate claim.
ST16000NM004J
Seagate Exos X18 manufacturer specifications ↗ · pages 2
Reviewed 2026-09-07. Published specifications; no independent benchmark or failure-rate claim.