Crucial P310 vs WD_BLACK SN850X at every capacity: prices, $/TB, speeds, endurance. Which to buy in July 2026 — full family comparison.
This page compares the Crucial P310 and WD_BLACK SN850X product families across all capacities we track. Per-capacity pricing changes the verdict more often than specs do, so start with the capacity table and then check the spec differences below.
On paper, the WD_BLACK SN850X family leads on sequential read (7,300 vs 7,100 MB/s). In practice, both saturate typical consumer workloads — the speed gap matters mainly for sustained multi-GB transfers.
Per-terabyte economics favor the Crucial P310: $129.75/TB at its best capacity, against $133.75/TB for the WD_BLACK SN850X. If budget drives the decision, the Crucial P310 is the default.
Architecturally, the WD_BLACK SN850X family uses a dedicated DRAM cache while the Crucial P310 relies on HMB (Host Memory Buffer). For OS and gaming duty they behave identically; sustained random writes favor DRAM.
| Capacity | Crucial P310 | WD_BLACK SN850X | |
|---|---|---|---|
| 1 TB | — | $220 · $220.00/TB | |
| 2 TB | $292 · $146.00/TB | $348 · $174.00/TB | Full comparison → |
| 4 TB | $519 · $129.75/TB | $535 · $133.75/TB | Full comparison → |
| 8 TB | — | $1300 · $162.50/TB |