Which is better, WD_BLACK SN850X 1TB or Crucial P310 2TB? July 2026 side-by-side with prices, specs, and verdict.
Both run on Gen 4 hardware but at different capacities: 1 TB for the WD_BLACK SN850X 1TB versus 2 TB for the Crucial P310 2TB. Whether the larger drive's $/TB advantage justifies the higher upfront cost depends on how much you actually need.
Hardware-wise, the WD_BLACK SN850X 1TB runs on WD's second-generation G2 in-house controller, tuned for sustained gaming I/O. The Crucial P310 2TB pairs Phison's E27T — a four-channel Gen 4 controller for HMB designs.
At a 34% price gap, the WD_BLACK SN850X 1TB needs to be measurably better in your specific use case to justify the spend. For gaming and general PC use, the Crucial P310 2TB's lower $/TB tilts the value equation decisively in its favor.
WD_BLACK SN850X 1TB bundles a DRAM cache chip; Crucial P310 2TB is DRAM-less. This sounds like a big deal but reviewers have been arguing for years about whether it actually matters in consumer use. For most workloads, no.
On warranty endurance the Crucial P310 2TB carries 880 TBW against WD_BLACK SN850X 1TB's 600 TBW. Both will outlast typical use, but the gap matters if you're doing professional content work.
PS5 owners get no measurable benefit from either drive's peak speed because Sony's internal NVMe controller throttles to ~5,500 MB/s; treat WD_BLACK SN850X 1TB and Crucial P310 2TB as interchangeable here and let price decide. Both drives use the 2280 form factor, which is too long for Steam Deck or ROG Ally — you'd need a 2230 variant if either manufacturer offers one, or a dedicated handheld-format drive instead.
Market context: the WD_BLACK SN850X 1TB ranks #2 of 4 Gen 4 1 TB drives we track by $/TB, while the Crucial P310 2TB ranks #4 of 11 Gen 4 2 TB drives. Neither is a value leader right now — if $/TB is your priority, check the cheaper alternatives below before committing.
Lean toward the WD_BLACK SN850X 1TB when the lower retail price ($220 vs $292), and a dedicated DRAM cache chip top your priority list. The SN850X has been the best-selling Gen 4 NVMe in PCPartPicker builds for two consecutive years — Game Mode 2.0 prioritizes I/O when supported titles need it.
Lean toward the Crucial P310 2TB when better $/TB economics ($146.00/TB), and a higher TBW endurance rating (880 TBW) top your priority list.