WD Ultrastar DC SN640 3.84TB U.2 NVMe PCIe 3.0
WD · Ultrastar DC SN640 · 3.84TB · NVMe · U.2 · PCIe 3.0 · 0.8 DWPD
Current asking prices
Median asking price
$695
Observed range
$695–$695
1 listing· 1 seller· Updated May 9, 2026
Market signals
Derived from observed listings across all SKUs in this class.
▶What do OEM / Original / Compatible mean?
OEMCertified by a server vendor (Dell, HPE, Lenovo). May carry firmware locks and qualifications. Priced higher for vendor support and warranty alignment.
OriginalThe underlying component manufacturer's part, without OEM server-vendor branding or firmware lock. Typically the market pricing reference — platform compatibility should still be verified.
CompatibleThird-party alternatives meeting the same spec. Often 15–40% cheaper. May trigger vendor warnings on OEM-locked platforms — verify before substituting.
Liquidity
Insufficient
Only 1 sample — treat any range as directional only.
▶What do the signal colors mean?
Favorable — Tight spread, meaningful discount, or strong liquidity.
Neutral — Normal market conditions. No action flag.
Investigate — Wide spread, inverted pricing, or low sample count.
High alert — Very wide spread or significant price anomaly.
Insufficient — Too few samples to produce a reliable signal.
Part numbers in this market
4 part numbers tracked for this SSD market.
| Manufacturer | MPN | Certification |
|---|---|---|
| Western Digital | 400-BEJH | oem |
| Western Digital | SN640-3840GB | original |
| Western Digital | WUS4BB038D7P3E1 | original |
| Western Digital | P13662-B21 | oem |
Signals are observations from available data at a point in time — not advice. Verify independently before transacting. Disclaimer
Compare nearby SSD markets
Related capacities and enterprise SSDs with a similar interface, form factor, or endurance class.
WD Ultrastar DC SN640 1.92TB U.2 NVMe PCIe 3.01.92TB · NVMe · U.2 · 0.8 DWPD→WD Ultrastar DC SN640 7.68TB U.2 NVMe PCIe 3.07.68TB · NVMe · U.2 · 0.8 DWPD→Samsung PM1733 3.84TB U.2 NVMe PCIe 4.03.84TB · NVMe · U.2 · 1 DWPD→Samsung PM9A3 3.84TB U.2 NVMe PCIe 4.03.84TB · NVMe · U.2 · 1.3 DWPD→Solidigm D7-P5520 3.84TB U.2 NVMe PCIe 4.03.84TB · NVMe · U.2 · 1.3 DWPD→Samsung PM1733 1.92TB U.2 NVMe PCIe 4.01.92TB · NVMe · U.2 · 1 DWPD→
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