WDS400T4B0E vs WDS400T4X0E
SSD head-to-head - specs, value and live price side by side.
Verdict
For a NAS cache or write-heavy pool, the WDS400T4X0E is the safer pick - the WDS400T4B0E uses QLC NAND, which wears out faster and slows badly under sustained writes (light, read-mostly use only).
Value at a glance
Price / TB
WDS400T4B0E
$116.74
WDS400T4X0E
$150.46
Endurance (TBW)
WDS400T4B0E
1,200 TB
WDS400T4X0E
2,400 TB
Price history
US · cheapest per day
WDS400T4B0E $530
WDS400T4X0E $610
zoomed ·
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| WDS400T4B0E | WDS400T4X0E | |
|---|---|---|
| Capacity | 4 TB | 4 TB |
| Form factor | M.2 | M.2 |
| Interface | NVMe | NVMe |
| NAND type | QLC | TLC |
| Endurance (TBW) | 1,200 TB | 2,400 TB |
| DWPD | - | - |
| DRAM cache | No | No |
| Power-loss protection | No | No |
| Sustained write | - | - |
| Cost / TBW | $0.389 | $0.251 |
| Price / TB | $116.74 | $150.46 |
| Buy |
$530
View at Amazon →
|
$610
View at Amazon →
|
Highlighted cells mark the stronger spec for a NAS build. Failure rates from Backblaze Drive Stats where available; $/TB uses the cheapest live price. Buy links are Amazon affiliate.
WDS400T4B0E
No Backblaze failure data for this model.
WDS400T4X0E
No Backblaze failure data for this model.