CT4000P3PSSD8 vs SB-RKT4P-4TB
SSD head-to-head - specs, value and live price side by side.
Verdict
For a NAS cache or write-heavy pool, the SB-RKT4P-4TB is the safer pick - the CT4000P3PSSD8 uses QLC NAND, which wears out faster and slows badly under sustained writes (light, read-mostly use only).
Value at a glance
Price / TB
CT4000P3PSSD8
$73.15
SB-RKT4P-4TB
$173.67
Endurance (TBW)
CT4000P3PSSD8
800 TB
SB-RKT4P-4TB
3,000 TB
Price history
US · cheapest per day
CT4000P3PSSD8 $590
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| CT4000P3PSSD8 | SB-RKT4P-4TB | |
|---|---|---|
| Capacity | 4 TB | 4 TB |
| Form factor | M.2 | M.2 |
| Interface | NVMe | NVMe |
| NAND type | QLC | TLC |
| Endurance (TBW) | 800 TB | 3,000 TB |
| DWPD | - | - |
| DRAM cache | No | Yes |
| Power-loss protection | No | No |
| Sustained write | - | - |
| Cost / TBW | $0.366 | $0.232 |
| Price / TB | $73.15 | $173.67 |
| Buy |
$590
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No US price yet |
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.
CT4000P3PSSD8
No Backblaze failure data for this model.
SB-RKT4P-4TB
No Backblaze failure data for this model.