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Green PCB expansion card with two blue USB ports and a metal bracket

STARTECH

STARTECH PEXUSB3S25 2 Port PCI Express USB 3.0 Expansion Card

SKU CH-MT7W-2YMY0 MPN PEXUSB3S25

Adds two 5 Gbps USB 3.0 ports with UASP and LP4 power to a PCI Express desktop, includes low-profile bracket

  • External USB ports2x USB Ports
  • Supported standardsUSB 3.0
  • Transfer speed5 Gbit/s
  • Product typePCI Express to USB Card
  • Key featuresBus Type: PCI Express Card Type: Standard Profile (LP bracke
  • Product weight0.35

Model LP4 - NEC 2 Ext

  • Adds two SuperSpeed USB 3.0 ports at 5 Gbps
  • Includes low-profile bracket for compact PC builds
  • Powered via LP4 connector for stable device operation
  • Supports USB Battery Charging 1.2 for faster charging
  • Built on NEC uPD720202 controller with UASP support

Two SuperSpeed USB 3.0 Ports

This PCI Express expansion card adds two external USB 3.0 ports to a desktop computer. It uses the NEC uPD720202 controller and fits a standard-profile slot with a low-profile bracket included. The card draws auxiliary power through an LP4 connector.

Upgrade from USB 2.0 Header Limits

The card replaces reliance on internal USB 2.0 headers or slower add-in cards by providing native 5 Gbps throughput. The jump is worthwhile when external drives or peripherals need the higher signalling rate and UASP support for reduced protocol overhead.

5 Gbps Bandwidth per Port

Each port delivers up to 5 Gbps and supports the USB Battery Charging 1.2 specification for faster device charging. Headroom is sufficient for external SSDs and high-capacity hard drives; sustained write workloads that exceed the PCIe lane allocation will saturate the link.

How it compares

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

Price $37.99
Pricier than about 61% of the 891 comparable items (median $30.99).

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Specifications

Product
Brand nameStarTech.com
Model namePEXUSB3S25
Product typePCI Express to USB Card
Performance
Transfer speed5 Gbit/s
Connectivity
Supported standardsUSB 3.0
Ports & slots
External USB ports2x USB Ports
Size & build
Shipping weight0.15 kg
Package size168 × 140 × 30 mm

Other versions of this model

3 more in the same range

Questions about this item

Will this card fit in a standard PCI Express slot and does it include a low-profile bracket?

Yes, the card uses a standard PCI Express x1 slot and ships with a low-profile bracket for half-height cases.

Do I need to connect the LP4 power connector on the card for the USB ports to work?

The LP4 connector must be plugged into a spare power-supply lead; without it the controller cannot deliver the 5 Gbps data rate or the battery-charging current.

Which chipset does this card use and will it need a driver update later?

The card uses the NEC uPD720202 controller; Windows 10 and later include native support so no separate driver install is required.

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