Product Type | PCIe U.3 NVMe SSD Adapter Card |
Form Factor | Full-height (vented bracket pre-installed) |
Bracket Type | Full-profile (pre-installed) and low-profile bracket included |
Interface Bus Type | PCI Express 4.0 |
Compatible PCIe Slots | x4, x8, x16 |
Chipset ID | Broadcom PEX PCIe bridge (exact part unlisted) |
Drive Compatibility | 2.5in U.3 NVMe SSD (SFF-TA-1001 connector) |
Non-Compatible Drives | U.2 NVMe SSDs |
Power Requirements | Powered through PCIe slot |
Hot Swappable | No |
Tool-less Installation | No – includes drive-mounting screws |
StarTech PCIe 4.0 x4 U.3 NVMe SSD Adapter Card - TAA Compliant





Key Benefits

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- Enables high-speed U.3 NVMe SSD deployment in PCIe 4.0 x4/x8/x16 slots, enhancing system performance.
- TAA compliance ensures suitability for government and secure enterprise environments.
- Pre-installed bracket and included mounting hardware streamline installation and reduce setup time.
Product Overview
INSTALL A 2.5INCH U.3 NVME SSD INTO A DESKTOP/SERVER USING AN A PCIE 4.0 X4, X8, OR X16 SLOT; NOT COMPATIBLE WITH U.2 DRIVES; WORKS WITH PCI EXPRESS 3.0; PRE-INSTALLED VENTED FULL-PROFILE BRACKET; DRIVE MOUNTING SCREWS INCLUDED; OS INDEPENDENTSpecifications
Product Overview
Physical & Environmental
Width | 18 mm (0.7 in) |
Length | 120 mm (4.7 in) |
Height | 70 mm (2.8 in) |
Product Weight | 62 g (2.2 oz) |
Operating Temperature | 0°C to 70°C (32°F to 158°F) |
Storage Temperature | -40°C to 85°C (-40°F to 185°F) |
Humidity | 15% to 90% RH (non-condensing) |
Cloud Management & Licensing
Software/Driver Requirements | OS independent – no drivers required |
Remote Management | Not supported |
Bundled Software | None |
Additional Information
Included Accessories | Drive mounting screws, low-profile bracket |
UPC | 065030899000 |
Manufacturer Part Number | PEX4SFF8639U3 |
Manufacturer | StarTech |
Interfaces
Internal Connector | SFF-8639 (U.3 interface) |
Host Interface | PCIe x4 (Gen 4.0), backward compatible with PCIe 3.0 |
Supported Link Speed | PCIe Gen 4.0 x4 – up to 64 Gbps |
Connector Type | 1 x PCI Express x4 Male |
Interface Standard | SFF-TA-1001 (U.3) |
Compliance & Origin
Country of Origin | Taiwan |
TAA Compliant | Yes |
Certifications | CE, FCC, RoHS |
Environmental Compliance | RoHS, REACH |
Advanced Security Features
Encryption Support | Dependent on installed SSD; adapter provides pass-through only |
Secure Boot Compatibility | Yes, when supported by SSD and host BIOS/UEFI |
Data Sanitization Support | Dependent on SSD capabilities |