WD - BLACK SN850X 4TB Internal SSD PCIe Gen 4 x4 NVMe
Price range: $599.99–1199.99
Brand: WD
Category: Ssd
A WD 4 TB PCIe Gen 4 x4 NVMe M.2 2280 SSD with up to 7,300 MB/s read, 6,600 MB/s write · 2400 TBW · TLC.
PQS: 100 (computed 2026-03-14 07:04:54.959393+00:00)
GTIN-14: 00619659193454
Key specs
A human-friendly subset of specs (non-null)
Capacity (GB)
4000
Form factor
M.2 2280
Interface
PCIe Gen 4 x4
NAND type
TLC
Read speed
7300 megabytes per second
Write speed
6600 megabytes per second
Endurance (TBW)
2400.0
How this Ssd compares vs. 328 ssds
Percentile rank for each spec — higher means this product outperforms more of its peers.
Spec Profile Radar
Visual snapshot — outer edge = 100th percentile (best in class)
Offers
| Retailer | SKU | Price | Stock | Offer | Last seen |
|---|---|---|---|---|---|
| B&H | WEWDBB9G0040 | 1199.99 USD | In stock | View offer → | 2026-03-14 02:34:25.838815+00:00 |
| Best Buy | 6512129 | 599.99 USD | In stock | View offer → | 2026-03-14 02:44:09.810755+00:00 |
| Newegg | 9SIA0ZXKT00088 | 769.61 USD | In stock | View offer → | 2026-03-13 02:19:37.697574+00:00 |
Recent price history (50)
| Retailer | Price | Stock | Seen at |
|---|---|---|---|
| bestbuy | 599.99 USD | In stock | 2026-03-14 02:44:09.810755+00:00 |
| bh | 1199.99 USD | In stock | 2026-03-14 02:34:25.838815+00:00 |
| bestbuy | 599.99 USD | In stock | 2026-03-13 02:53:48.302117+00:00 |
| bh | 1199.99 USD | In stock | 2026-03-13 02:43:11.319639+00:00 |
| newegg | 769.61 USD | In stock | 2026-03-13 02:19:37.697574+00:00 |
| bestbuy | 599.99 USD | In stock | 2026-03-12 02:44:49.311417+00:00 |
| bh | 1199.99 USD | In stock | 2026-03-12 02:38:22.376808+00:00 |
| newegg | 769.61 USD | In stock | 2026-03-12 02:23:35.737048+00:00 |
| bestbuy | 599.99 USD | In stock | 2026-03-11 02:43:20.663480+00:00 |
| bh | 1199.99 USD | In stock | 2026-03-11 02:41:10.625664+00:00 |
| newegg | 769.61 USD | In stock | 2026-03-11 02:13:17.957802+00:00 |
| bestbuy | 1119.99 USD | In stock | 2026-03-10 02:53:14.939764+00:00 |
| bh | 1199.99 USD | In stock | 2026-03-10 02:32:03.486877+00:00 |
| newegg | 769.61 USD | In stock | 2026-03-10 02:20:48.720102+00:00 |
| bestbuy | 1119.99 USD | In stock | 2026-03-09 02:51:52.315257+00:00 |
| bh | 1199.99 USD | In stock | 2026-03-09 02:39:19.202615+00:00 |
| newegg | 769.56 USD | In stock | 2026-03-09 02:23:08.293153+00:00 |
| newegg | 769.56 USD | In stock | 2026-03-08 05:46:21.136818+00:00 |
| bh | 1199.99 USD | In stock | 2026-03-08 05:45:51.464506+00:00 |
| bh | 1199.99 USD | In stock | 2026-03-06 09:04:20.768129+00:00 |
| newegg | 769.56 USD | In stock | 2026-03-06 08:40:34.481932+00:00 |
| bestbuy | 1119.99 USD | In stock | 2026-03-06 06:09:33.551299+00:00 |
| bh | 1199.99 USD | Out of stock | 2026-03-03 02:39:30.182321+00:00 |
| newegg | 769.56 USD | Out of stock | 2026-03-03 02:19:03.643434+00:00 |
| bestbuy | 589.99 USD | In stock | 2026-03-03 01:59:56.460703+00:00 |
| newegg | 769.56 USD | Out of stock | 2026-03-02 10:42:34.283913+00:00 |
| bh | 1119.99 USD | Out of stock | 2026-03-02 10:41:06.653023+00:00 |
| bestbuy | 589.99 USD | In stock | 2026-03-02 08:03:11.146988+00:00 |
| bh | 1119.99 USD | Out of stock | 2026-03-02 06:25:29.391596+00:00 |
Full specs
Show full spec table
| Capacity (GB) | 4000 |
|---|---|
| Form factor | M.2 2280 |
| Interface | PCIe Gen 4 x4 |
| NAND type | TLC |
| Read speed | 7300 megabytes per second |
| Write speed | 6600 megabytes per second |
| Endurance (TBW) | 2400.0 |
| Reconciled at | 2026-03-06 10:56:32.254648+00:00 |
Canonical JSON (expand)
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Debug data (expand)
| Raw title | WD - BLACK SN850X 4TB Internal SSD PCIe Gen 4 x4 NVMe |
|---|---|
| Raw brand | WD |
| Raw category | Best Buy > Computers & Tablets > Computer Accessories & Peripherals > Hard Drives, SSD & Storage > Internal SSDs |
Canonical highlights (non-null)
| core.title | WD - BLACK SN850X 4TB Internal SSD PCIe Gen 4 x4 NVMe |
|---|---|
| core.seo_title | WD WDBB9G0040BNC-WRSN - 4TB SSD |
| brand | WD |
| model | WDBB9G0040BNC-WRSN |
| gtin14 | 00619659193454 |
| images[0] | https://pisces.bbystatic.com/prescaled/500/500/image2/BestBuy_US/images/products/284eb65b-7099-4ccd-ba90-1cd5df5a2f47.jpg |
| storage.interface | PCIe Gen 4 x4 |
| storage.nand_type | TLC |
| storage.read_speed | 7300 megabytes per second |
| storage.capacity_gb | 4000 |
| storage.form_factor | M.2 2280 |
| storage.write_speed | 6600 megabytes per second |
| storage.endurance_tbw | 2400.0 |
| category | ssd |
| physical.width_in | 0.87 |
| physical.height_in | 0.09 |
| physical.weight_kg | 0.01 |
| physical.dimensions_in | 0.09 x 0.87 x ? in |
| warranty.labor | 5 Years |
| warranty.parts | 5 Years |
| schema_version | 1 |
BestBuy raw specs (pretty)
Expand BestBuy raw JSON
{
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"upc": "619659193454",
"url": "https://api.bestbuy.com/click/-/6512129/pdp",
"name": "WD - BLACK SN850X 4TB Internal SSD PCIe Gen 4 x4 NVMe",
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{
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{
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"value": "2400 terabytes",
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"value": "No",
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{
"feature": "Reach high performance\nThe NVMe technology delivers up to 7300MB/sec. data transfer rate speed for a smooth, responsive and powerful gaming experience."
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{
"feature": "Limited warranty\nThis WD_BLACK SN850X SSD comes with a 5-year warranty."
},
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"feature": "Game Mode 2.0 technology\nIncludes performance-boosting features, such as load prediction to ready game assets for fast in-game loading."
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"longDescription": "Strap in for breakneck gaming speeds with the WD_BLACK SN850X NVMe internal SSD. Crush load times and slash throttling, lagging, and model pop-ins for a smooth, fast experience that lets you compete at your absolute peak. This purpose-built gaming drive comes in the capacity of 4TB. With the advanced features of Game Mode 2.0 (Windows only) plus speeds that approach the limits of the PCIe Gen43 interface, the WD_BLACK SN850X NVMe SSD delivers top-tier performance to keep you playing, streaming, recording, and dominating the game.",
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Newegg raw specs
raw_specs_text (pretty) — expand
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