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StarTech PEX4SFF8639U3 U.3 to PCIe Adapter Card For U.3 SSDs
PCIe 4.0 x4 adapter for mounting one 2.5-inch U.3 NVMe SFF-TA-1001 SSD directly in a desktop or server.
Frequently asked questions
What does PEX4SFF8639U3 do?
Installs one fixed 2.5-inch U.3 NVMe SSD up to 15mm high in a PCIe x4, x8 or x16 slot without a drive backplane or data cable.
Who is this product best for?
Servers and workstations that need direct high-performance U.3 NVMe storage in an available PCI Express expansion slot.
What should I check before ordering?
This adapter supports U.3 SFF-TA-1001 drives only; U.2, SAS and SATA drives are not compatible. Confirm PCIe slot clearance and NVMe support.
Does it require drivers or software?
The adapter needs no dedicated software, but the operating system, firmware and installed U.3 SSD must support NVMe.
What is included in the package?
U.3-to-PCIe x4 adapter, four drive-mounting screws and quick-start guide.
What is the key installation requirement?
Secure the 2.5-inch U.3 SSD to the adapter, install the assembly in a PCIe x4 or larger slot and confirm host NVMe support.
Is it suitable for an Australian setup?
Yes. DeviceDeal supplies the Australian-market version; always confirm the available ports, power and system compatibility for your installation.
What warranty applies?
PEX4SFF8639U3 carries a StarTech.com 2 years manufacturer warranty, subject to the manufacturers terms and eligibility requirements.
Planning a broader setup? Browse the DeviceDeal buying guides. View the DeviceDeal product page.
(PEX4SFF8639U3)
Why choose PEX4SFF8639U3?

PEX4SFF8639U3 specifications
Exact-model specifications for compatibility checking.
| Warranty Information | |
|---|---|
| Warranty | 2 Years |
| Connector(s) | |
| Drive Connector | 1 - U.3 (PCIe, NVMe, SFF-TA-1001) |
| Host Connector | 1 - PCI Express x4 |
| Other Interface | 1 - IDC (2 pin, motherboard header) |
| Hardware | |
| Interface | PCI Express x4 |
| Bus Type | PCI Express |
| Number of Drives | 1 |
| Drive Size | 2.5in |
| Compatible Drive Type | U.3 PCIe NVMe (SFF-TA-1001) |
| Drive Installation | Fixed |
| Supported Drive Heights | 5mm, 7mm, 9.5mm, 12.5mm and 15mm |
| Performance | |
| Hardware RAID Supported | No |
| Hot Swap Capability | No |
| MTBF | 21,693,912 hours |
| Software | |
| OS Compatibility | No additional drivers or software required; NVMe support depends on the drive, operating system and host firmware |
| Special Notes / Requirements | |
| Compatibility | U.3 drives only; U.2, SAS and SATA drives are not compatible |
| PCIe Compatibility | PCIe 4.0 x4; backward compatible with PCIe 3.0 x4/x8/x16 slots at reduced performance |
| Environmental | |
| Operating Temperature | 0°C to 60°C |
| Storage Temperature | -40°C to 80°C |
| Humidity | 20% to 80% RH |
| What's in the Box | |
| Included | 1 - U.3-to-PCIe x4 adapter; 4 - drive-mounting screws; 1 - quick-start guide |
Sources: supplied product file, DeviceDeal product page and official StarTech.com specifications. Product appearance and specifications may change; confirm critical deployment requirements before ordering.
| SKU | PEX4SFF8639U3 |
| Barcode # | 65030899000 |
| Brand | Startech |
| Shipping Weight | 0.1300kg |
| Shipping Width | 0.160m |
| Shipping Height | 0.030m |
| Shipping Length | 0.220m |
This Australian-version product is supplied by DeviceDeal and is covered by the official StarTech.com 2 years manufacturer warranty in Australia.
- Keep your DeviceDeal tax invoice as proof of purchase.
- Coverage is subject to StarTech.com warranty terms, eligibility and product assessment.
- Warranty service does not replace rights that may apply under Australian Consumer Law.
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