Verdict

For a NAS cache or write-heavy pool, the CT4000T705SSD3 is the safer pick - the CT4000P3PSSD8 uses QLC NAND, which wears out faster and slows badly under sustained writes (light, read-mostly use only).

CT4000P3PSSD8
Crucial P3 Plus · 4TB · Desktop
$579 ($144.74/TB)
CT4000T705SSD3
Crucial T705 · 4TB · Desktop
$508 ($127.05/TB)

Value at a glance

Price / TB
CT4000P3PSSD8 $73.15
CT4000T705SSD3 $127.05
Endurance (TBW)
CT4000P3PSSD8 800 TB
CT4000T705SSD3 2,400 TB

Price history

US · cheapest per day

CT4000P3PSSD8 $579 CT4000T705SSD3 $508
zoomed · drag to zoom
$824 $509 $194 Sep 2024 Jan 2025 Jun 2025 Nov 2025 Apr 2026 Sep 2026
CT4000P3PSSD8 CT4000T705SSD3
Capacity 4 TB 4 TB
Form factor M.2 M.2
Interface NVMe NVMe
NAND type QLC TLC
Endurance (TBW) 800 TB 2,400 TB
DWPD - -
DRAM cache No Yes
Power-loss protection No No
Sustained write - -
Cost / TBW $0.366 $0.212
Price / TB $73.15 $127.05
Buy
$579
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$508
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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.

CT4000T705SSD3

No Backblaze failure data for this model.