Western Digital WD_Black SN850X 4TB
The current Western Digital WD_Black SN850X 4TB price from retailers, its key specifications, and how it performs for each job.
Western Digital · SSD · PCIe 4.0
Retailer photo of Western Digital WD_Black SN850X 4TB. View this offer in Where to buy
Works well for: System Drive, Game & File Storage, Heavy Creative Work
Trade-offs: you want strong value with Balanced priorities specifically
- Capacity
- 4 TB
- Interface
- M.2 PCIe 4.0 x4
- Sequential read
- 7300 MB/s
- Sequential write
- 6600 MB/s
- Endurance
- 2400 TBW
- Form factor
- M.2-2280
Move a slider and the page re-scores this product against the same market frame.
What does it cost today, and is that a good price?
Market confidence: MediumAt $656 the Western Digital WD_Black SN850X 4TB is priced 13% below its $750 representative market level. Western Digital SN7100 500GB currently does the same job for $104.
Worth putting side by side:Compare with Western Digital SN7100 500GB
Prices & availability
Western Digital WD_Black SN850X 4TB: current price and offers
Compare the offers we track for this model, across variants and retailers.
4 tracked offers · 3 retailers
| Variant | Store | Condition | Price (snapshot) | Value · Balanced | Checked | Offer link |
|---|---|---|---|---|---|---|
| Western Digital WD_Black SN850X 4TB | Newegg | New | $656 | 45 | 2026-11-09 | View offer → |
| Western Digital WD_Black SN850X 4TB | CentralComputer | New | $750 | 39 | 2026-11-09 | View offer → |
| Western Digital WD_Black SN850X 4TB (Heatsink) | Amazon | New | Check on Amazon | 39 | 2026-11-09 | View offer → |
| Western Digital WD_Black SN850X 4TB (Heatsink) | Newegg | New | $765 | 39 | 2026-11-09 | View offer → |
Prices are dated snapshots, not live quotes — confirm the final price at the store. New, refurbished and used offers are listed separately; used offers carry warranty and seller risk.
Performance and where it ranks
Two different questions, side by side. Performance compares what the hardware can do; Value compares what that capability costs at today’s price. A product can rank high on one and low on the other — that gap is the point.
Performance Balanced
How much it can do. Price plays no part in this ranking.
#41 of 239 graded solid state drives
- #38 TeamGroupTeamGroup MP44 1TB 50
- #39 SeagateSeagate FireCuda 530R 1TB 50
- #40 Western DigitalWestern Digital Black SN850X 8TB 49
- #41 Western DigitalWestern Digital WD_Black SN850X 4TB 49
- #42 KingstonKingston KC3000 4TB 49
- #43 Western DigitalWestern Digital Black SN850X 2TB 49
- #44 KingstonKingston Fury Renegade Heat Sink 2TB 49
Value Balanced
How much of that you get for today’s price.
#111 of 239 currently priced solid state drives
- #108 KingstonKingston NV3 4TB 46
- #109 CrucialCrucial P310 500GB 46
- #110 Silicon PowerSilicon Power UD90 2TB 45
- #111 Western DigitalWestern Digital WD_Black SN850X 4TB 45
- #112 CorsairCorsair MP600 ELITE 1TB 45
- #113 CrucialCrucial P3 Plus 2TB 45
- #114 LexarLexar NQ790 2TB 45
Performance System Drive
How much it can do. Price plays no part in this ranking.
#41 of 239 graded solid state drives
- #38 TeamGroupTeamGroup MP44 1TB 50
- #39 SeagateSeagate FireCuda 530R 1TB 50
- #40 Western DigitalWestern Digital Black SN850X 8TB 49
- #41 Western DigitalWestern Digital WD_Black SN850X 4TB 49
- #42 KingstonKingston KC3000 4TB 49
- #43 Western DigitalWestern Digital Black SN850X 2TB 49
- #44 KingstonKingston Fury Renegade Heat Sink 2TB 49
Value System Drive
How much of that you get for today’s price.
#132 of 239 currently priced solid state drives
- #129 CorsairCorsair MP600 ELITE 4TB 23
- #130 SamsungSamsung 980 500GB 23
- #131 TranscendTranscend 220S 256GB 22
- #132 Western DigitalWestern Digital WD_Black SN850X 4TB 22
- #133 Western DigitalWestern Digital Blue SN550 1TB 22
- #134 SabrentSabrent Rocket Plus 1TB 22
- #135 TranscendTranscend 110S 256GB 22
Performance Game
How much it can do. Price plays no part in this ranking.
#14 of 239 graded solid state drives
- #11 SamsungSamsung 990 Pro 4TB 50
- #12 TeamGroupTeamGroup MP44 4TB 50
- #13 SeagateSeagate FireCuda 530R 4TB 50
- #14 Western DigitalWestern Digital WD_Black SN850X 4TB 50
- #15 KingstonKingston KC3000 4TB 50
- #16 SamsungSamsung 990 EVO Plus 4TB 50
- #17 CrucialCrucial P310 4TB 50
Value Game
How much of that you get for today’s price.
#91 of 239 currently priced solid state drives
- #88 Western DigitalWestern Digital Black SN850X 2TB 67
- #89 PNYPNY CS2241 2TB 67
- #90 PNYPNY CS2241 500GB 67
- #91 Western DigitalWestern Digital WD_Black SN850X 4TB 67
- #92 Western DigitalWestern Digital Blue SN5100 500GB 67
- #93 Western DigitalWestern Digital Green 1TB 66
- #94 PNYPNY CS2150 2TB 65
Performance Heavy Creative Work
How much it can do. Price plays no part in this ranking.
#46 of 239 graded solid state drives
- #43 Western DigitalWestern Digital Blue SN5100 2TB 48
- #44 Western DigitalWestern Digital Blue SN5100 1TB 48
- #45 Western DigitalWestern Digital Black SN850X 8TB 47
- #46 Western DigitalWestern Digital WD_Black SN850X 4TB 47
- #47 SabrentSabrent Rocket Plus 4TB 47
- #48 Western DigitalWestern Digital Black SN850X 2TB 47
- #49 Western DigitalWestern Digital WD_Black SN850X 1TB 47
Value Heavy Creative Work
How much of that you get for today’s price.
#66 of 239 currently priced solid state drives
- #63 SamsungSamsung 9100 PRO 8TB 54
- #64 CorsairCorsair MP600 ELITE 4TB 54
- #65 CorsairCorsair MP600 ELITE PS5 1TB 54
- #66 Western DigitalWestern Digital WD_Black SN850X 4TB 54
- #67 MSIMSI SPATIUM M470 PRO 2TB 53
- #68 CrucialCrucial T500 2TB 53
- #69 KingstonKingston KC3000 4TB 53
These ladders follow the preset scenario shown above. Your own weights re-score this product, not the whole field.
What it is good for
| Scenario | this productCapability grade · Value at current price | Higher capability | Higher Value with current priorities |
|---|---|---|---|
| Balanced (all-round)Weighted all-round view | GradeNo grade Value45 | Higher capability Crucial T710 1TB 88 +104% capability · -65% price | Higher Value with current priorities Western Digital SN7100 500GB 100 -7% capability · -84% price |
| System DriveScenario capability | GradeS Value22 | Higher capability Crucial T710 1TB S 93 +104% capability · -65% price | Higher Value with current priorities Western Digital SN7100 500GB S 100 -7% capability · -84% price |
| Game & File StorageScenario capability | GradeS Value67 | — | Higher Value with current priorities Western Digital WD Blue SN5000 4TB S 86 +0% capability · -25% price |
| Heavy Creative WorkScenario capability | GradeS Value54 | Higher capability Western Digital SN8100 2TB S 88 +112% capability · -31% price | Higher Value with current priorities Crucial T710 1TB S 100 +108% capability · -65% price |
Balanced has no letter: it is a weighting preset, not a capability rubric. A grade answers “how well does this handle that job?” — price is never part of it. Relative Value puts the current market price back in.
Compare these grades with the full tier list
Browse shortlists for different uses
Trade-offs
Works well if
- System Drive is your main prioritygraded S for System Drive on the same rubric as the tier list
Consider other options if
- You want strong value with Balanced priorities specificallyat today's market no realistic price for this model reaches strong value with Balanced priorities — the calculation only gets there near $369, against a cheapest tracked $656
- Value for money matters more to you than this exact modelWestern Digital SN7100 500GB holds Relative Value 100 against its 45 with Balanced priorities, at $104
Works well if
- System Drive is your main prioritygraded S for System Drive on the same rubric as the tier list
Consider other options if
- You want strong value for System Drive specificallyat today's market no realistic price for this model reaches strong value for System Drive — the calculation only gets there near $181, against a cheapest tracked $656
- Value for money matters more to you than this exact modelWestern Digital SN7100 500GB holds Relative Value 100 against its 22 for System Drive, at $104
- You are buying for System Drive and want no asterisksthe rubric caps this grade: read speed taken from another capacity of the same drive family — not measured for this exact model
Works well if
- Game is your main prioritygraded S for Game on the same rubric as the tier list
- Strong-value threshold: ~$548$548 is where Relative Value reaches 80 for Game, in the 2026-11-02–2026-11-09 offer frame
Consider other options if
- Current price sits $108 above the strong-value threshold (~$548)cheapest tracked $656 against a $548 calculated threshold for Game
- Value for money matters more to you than this exact modelWestern Digital WD Blue SN5000 4TB holds Relative Value 86 against its 67 for Game, at $491
Works well if
- Heavy Creative Work is your main prioritygraded S for Heavy Creative Work on the same rubric as the tier list
Consider other options if
- You want strong value for Heavy Creative Work specificallyat today's market no realistic price for this model reaches strong value for Heavy Creative Work — the calculation only gets there near $294, against a cheapest tracked $656
- Value for money matters more to you than this exact modelCrucial T710 1TB holds Relative Value 100 against its 54 for Heavy Creative Work, at $230
- You are buying for Heavy Creative Work and want no asterisksthe rubric caps this grade: write speed inferred, not measured for this exact model
Every line states the fact it was derived from, for the scenario selected above. Thresholds are calculated points on our value curve — information about where the maths turns, not instructions about what to pay.
Similar options to the Western Digital WD_Black SN850X 4TB
Chosen for Balanced
Chosen for System Drive
Chosen for Game
Chosen for Heavy Creative Work
Alternatives stay near this product’s price range. Step-up options may exceed the standard budget envelope when the capability gain is meaningful.
More head-to-head comparisons in this category
Upgrade planner
Judge the change in the active scenario, then make the cash gap explicit.
Using page scenarioWhat are you upgrading from? These are the axes we compare on, and where this product stands in the current market.
Capability differences are expressed as tiers and index points, not as benchmark percentages we did not measure.
Specifications and compatibility
What this product is, and what to check before it goes into your build.
Performance
- Sequential read
- 7300 MB/s
- Sequential write
- 6600 MB/s
- Random read
- 0 IOPS
- Random write
- 0 IOPS
- Controller
- WD Proprietary
Media
- Capacity
- 4 TB
- NAND type
- SanDisk 112-layer TLC
- DRAM cache
- 4GB DDR4
Power / Interface
- Interface
- M.2 PCIe 4.0 x4
- Form factor
- M.2-2280
Physical / Outputs
- Heatsink included
- No
Show all specifications
Endurance & warranty
- Endurance
- 2400 TBW
- Warranty
- 5 years
- Manufacturer part number
- WDS400T2X0E
Hover any value to see where it came from: a manufacturer specification, or a figure The Comparator calculated.
Sources: Comparator offer frame 2026-11-02–2026-11-09
What to check in your build
M.2-2280
The slot must take M.2-2280
M.2 PCIe 4.0 x4
PCIe 4.0 M.2 slot for full speed
PCIe 4.0 — runs in older slots at their speed
Fits under an M.2 shroud
Bare drive — it fits under a motherboard M.2 shroud
Meets the PS5 expansion requirements
M.2 2280 NVMe, PCIe 4.0, 7300 MB/s read — meets Sony's published requirements; a heatsink is required
Found an error? Report this specification Email the field, corrected value and an optional source.
Compatibility guidance is practical help, not a score. Missing data is shown as unknown, never invented.
Summary
Western Digital WD_Black SN850X 4TB offers a balanced view across an all-round mix of priorities. It ranks #41 by capability in the current modelled field. Its clearest measured strength is drive capability 7300. Western Digital SN7100 500GB currently clears the same practical bar with stronger Relative Value.
Western Digital WD_Black SN850X 4TB offers S-grade capability for System Drive. It ranks #41 by capability in the current modelled field. Its clearest measured strength is drive capability 7300. Western Digital SN7100 500GB currently clears the same practical bar with stronger Relative Value.
Western Digital WD_Black SN850X 4TB offers S-grade capability for Game. It ranks #14 by capability in the current modelled field. Its clearest measured strength is drive capability 7300. TeamGroup MP44 4TB currently clears the same practical bar with stronger Relative Value.
Western Digital WD_Black SN850X 4TB offers S-grade capability for Heavy Creative Work. It ranks #46 by capability in the current modelled field. Its clearest measured strength is drive capability 7300. Crucial P510 1TB currently clears the same practical bar with stronger Relative Value.
FAQ
Why does Relative Value change when I choose another scenario?
Each scenario changes the weights applied to capability, price and the other published factors. The hardware facts stay fixed, but the value question changes, so its score and rank can change too.
Why can Amazon appear without a tracked price?
Amazon listing snapshots can participate in Value while fresh. We show Check on Amazon instead of its price; confirm the current price and availability at the store. When no current listing snapshot exists, Amazon is a search link only.
Useful links & sources
offer frame 2026-11-02–2026-11-09 · formula ssd-value-v6.1 · facts facts-2026-11-09 · Relative Value is an estimate from our current dataset, the selected weights and dated market prices — not an official product rating and not a price forecast. Target prices are calculation thresholds, not predictions. Methodology We are not a shop. Affiliate links may earn us a commission; they never change the calculations or the ranking.