Crucial P310 vs WD_BLACK SN850X at every capacity: prices, $/TB, speeds, endurance. Which to buy in September 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: $143.50/TB at its best capacity, against $164.75/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 | — | $249 · $249.00/TB | |
| 2 TB | $299 · $149.50/TB | $390 · $195.00/TB | Full comparison → |
| 4 TB | $574 · $143.50/TB | $659 · $164.75/TB | Full comparison → |
| 8 TB | — | $1598 · $199.75/TB |