Green circuit board with gold edge connector and silver U.2 socket, four small mounting screws beside it

STARTECH

STARTECH PEX4SFF8639 U.2 to PCIe expansion card

SKU CH-Z9R6-AXVF2 MPN PEX4SFF8639

Adds a 2.5in U.2 NVMe SSD to a PC or server through a PCI Express 3.0 x4 slot

TypeU.2 to PCIe Adapter - x4 PCIe
SpecificationsBus Type: PCI Express Compatible Drive Types: U.2 (SFF-8639,
FeaturesU.2 to PCIe Adapter - x4 PCIe - For 2.5" U.2 NVMe SSD - SFF-
Dimensions0.90" x 6.50" x 4.80"
Weight0.14 lbs.
Package Contents1 - drive adapter card 4 - drive-mounting screws 1 - quick-s

Mount a 2.5" U.2 NVMe SSD directly into a PCIe slot
Add high-speed NVMe storage without cables using the fixed-mount design
Works with PCIe 3.0 x4 and 2.0 motherboards for broad compatibility
Supports drive heights from 5 mm to 15 mm for flexible SSD choice
Compact card measures 0.90" x 6.50" x 4.80" and weighs 0.14 lbs.

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U.2 NVMe PCIe Adapter

The StarTech PEX4SFF8639 is a PCI Express 3.0 x4 expansion card that lets you install a single 2.5in U.2 NVMe SSD into any desktop or server with a free PCIe slot. It targets system builders and IT professionals who need enterprise-grade U.2 storage without a dedicated backplane or drive bay.

Fixed Mount, Direct Connection

The card holds the SSD in a fixed position using the included screws, supporting drive heights of 5mm, 7mm, 9.5mm, 12.5mm and 15mm. This design removes the need for separate adapter cables, simplifying cable routing inside the chassis and reducing potential connection points.

Passive Thermal Design

With no onboard fan or active cooling, the adapter relies entirely on case airflow to manage SSD temperatures. Power draw is limited to the drive itself, adding negligible load to the PCIe slot and keeping acoustic output at zero during normal operation.

Акценти

Mount a 2.5" U.2 NVMe SSD directly into a PCIe slot
Add high-speed NVMe storage without cables using the fixed-mount design
Works with PCIe 3.0 x4 and 2.0 motherboards for broad compatibility
Supports drive heights from 5 mm to 15 mm for flexible SSD choice
Compact card measures 0.90" x 6.50" x 4.80" and weighs 0.14 lbs.

Спецификации

Brand	StarTech.com
Model	PEX4SFF8639
Type	U.2 to PCIe Adapter - x4 PCIe
Specifications	Bus Type: PCI Express Compatible Drive Types: U.2 (SFF-8639, x4 PCIe, NVMe) Drive Installation: Fixed Drive Size: 2.5in Interface : PCI Express Number of Drives: 1 Supported Drive Height(s): 15mm 12.5mm 9.5mm 7mm 5mm
Features	U.2 to PCIe Adapter - x4 PCIe - For 2.5" U.2 NVMe SSD - SFF-8639 PCIe Adapter - U.2 SSD - PCIe SSD - U.2 drive
Dimensions	0.90" x 6.50" x 4.80"
Weight	0.14 lbs.
Package Contents	1 - drive adapter card 4 - drive-mounting screws 1 - quick-start guide
Тегло на пратката	0.16 kg
Размери на опаковката	218 × 157 × 48 mm

Въпроси за този артикул

What PCIe version and lane width does the PEX4SFF8639 use, and what throughput does that cap at?

The card runs at PCIe 3.0 x4, so the drive is limited to the bandwidth of a 3.0 x4 link.

Which drive heights and screw pattern does the adapter accept for a 2.5in U.2 SSD?

It supports 5mm, 7mm, 9.5mm, 12.5mm and 15mm drives and includes four mounting screws for the fixed installation.

How is the SSD attached to the card, and what step is often missed during installation?

The drive mounts directly onto the adapter with the supplied screws; a common mistake is leaving the drive unsecured before seating the card in the PCIe slot.

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