NAND: SNV3S/4000G lists 3D (cell type not specified); WDS400T2XHE lists TLC 3D NAND.
Heatsink: SNV3S/4000G lists Not included; WDS400T2XHE lists Included.
Endurance (TBW): SNV3S/4000G lists 1280; WDS400T2XHE lists 2400.
Sequential read (up to MB/s): SNV3S/4000G lists 6000; WDS400T2XHE lists 7300.
Manufacturer limited warranty: SNV3S/4000G lists 5 years or Percentage Used reaches 100%, whichever comes first; WDS400T2XHE lists 5 years or TBW limit, whichever comes first.
Sequential write (up to MB/s): SNV3S/4000G lists 5000; WDS400T2XHE lists 6600.

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

Show differences only

Manufacturer specifications for SNV3S/4000G and WDS400T2XHE
Specification	SNV3S/4000G	WDS400T2XHE
Manufacturer	Kingston	Western Digital
Product family	NV3	Black SN850X
Model number	SNV3S/4000G	WDS400T2XHE
Capacity (TB)	4	4
NAND	3D (cell type not specified)	TLC 3D NAND
Heatsink	Not included	Included
Interface	PCIe 4.0 x4 / NVMe	PCIe 4.0 x4 / NVMe
PCB sides	Single-sided	Not recorded
Form factor	M.2 2280	M.2 2280
Endurance (TBW)	1280	2400
Sequential read (up to MB/s)	6000	7300
Manufacturer limited warranty	5 years or Percentage Used reaches 100%, whichever comes first	5 years or TBW limit, whichever comes first
Sequential write (up to MB/s)	5000	6600

Compatibility and buying checks

Sequential speeds are manufacturer maxima, not measured game load times. Check your PCIe generation, M.2 dimensions and cooling clearance. The lower of the time or endurance limit normally governs a limited SSD warranty.
Compare new and renewed offers separately. The manufacturer specification does not guarantee the warranty or return policy of a marketplace seller.

Reviewed 2026-09-08. Published specifications; no independent benchmark or failure-rate claim.

Reviewed 2026-09-07. Published specifications; no independent benchmark or failure-rate claim.