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Green circuit board with silver SFF-8643 connector and metal bracket

STARTECH

STARTECH PEX4SFF8643 x4 PCIe 3.0 to SFF-8643 expansion card

SKU CH-0MC4-F2GFY MPN PEX4SFF8643

Adds a 2.5" U.2 NVMe SSD via a PCIe 3.0 x4 lane host adapter compatible with PCIe 2.0 motherboards

  • Product typex4 PCI Express to SFF-8643
  • DetailsAdd high-performance enterprise-class storage to your PC or
  • Key featuresAdd an enterprise-class PCIe NVMe 2.5 in U.2 SSD capability
  • Product dimensions0.9 in × 3.1 in × 3.7 in
  • Product weight1 oz
  • In the box1 x x4 PCI Express to SFF-8643 adapter 1 x low-profile brack
  • Add enterprise-class U.2 NVMe storage to a PC or server
  • Connect a 2.5" U.2 NVMe SSD via a 4-lane PCIe 3.0 slot
  • Works with PCIe 3.0 and 2.0 motherboards for broad compatibility
  • Includes full-profile and low-profile brackets for flexible installation
  • Compact .90" x 3.10" x 3.70" card fits tight spaces

Add U.2 NVMe storage to desktop or server

This x4 PCI Express adapter adds a SFF-8643 port so a 2.5" U.2 NVMe SSD such as the Intel SSD 750 series can be installed in a standard expansion slot. It targets IT professionals and system integrators who want enterprise-class storage without replacing the motherboard or chassis.

Requires a PCIe 3.0 or 2.0 slot with four lanes

The card operates as a PCI Express 3.0 x4 host adapter and is backward compatible with PCIe 2.0 motherboards. If the platform cannot supply a four-lane slot the drive will not reach its rated throughput, so verify the slot configuration before purchase.

Passive design draws minimal power

With no active cooling the adapter runs silently and adds negligible load to the system power budget. The low-profile bracket is included for compact builds, while the pre-installed full-profile bracket fits standard height cases.

How it compares

Measured against everything we stock in PCIe Expansion Cards, at today’s prices. Recalculated every night.

Price $26.99
Cheaper than about 57% of the 891 comparable items (median $30.99).

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Specifications

Product
Brand nameStarTech.com
Model namePEX4SFF8643
Product typex4 PCI Express to SFF-8643
Size & build
Product dimensions0.9 in × 3.1 in × 3.7 in
Product weight1 oz
Shipping weight0.10 kg
Package size170 × 142 × 30 mm
In the box
In the box1 x x4 PCI Express to SFF-8643 adapter
1 x low-profile bracket
1 x full-profile bracket (installed)
1 x quick-start guide

Questions about this item

How does the x4 PCIe 3.0 link affect real-world throughput for a U.2 NVMe SSD?

The card runs at PCIe 3.0 x4, so a U.2 NVMe SSD can use up to four lanes of third-generation bandwidth; actual speed depends on the drive and the host slot.

Does the SFF-8643 connector limit the SSD to a specific PCIe generation?

The SFF-8643 port carries four PCIe lanes and is electrically compatible with both PCIe 3.0 and 2.0 motherboards, so the generation is set by the slot, not the connector.

What clearance is needed to install the card in a standard chassis?

The board measures .90 by 3.10 by 3.70 inches and ships with both a full-profile bracket installed and a low-profile bracket for slim cases.

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