StarTech.com PEXUSB311AC3 · USB PCIe host card

MPN / P/N

PEXUSB311AC3

Manufacturer designation

2-Port 10Gbps USB-A & USB-C PCIe Card - USB 3.2 Gen 2 PCI Express Type C/A Host Controller Card Adapter - USB 3.2 Gen 2 PCIe Expansion Add-On Card - Windows, macOS, Linux - TAA

Microsoft WHQL Certified Requirements

Yes

Manufacturer conditions

The card's USB-C port is a standard data throughput port. It; does not support DP Alt Mode or USB Power Delivery; The maximum throughput of this card is limited by the bus; interface

System and cable requirements

PCI Express enabled computer or server with a PCI Express x4; slot or higher (x8, x16); Optional SATA power connector

Colour

Red

Material

Steel

Product length

4.7 in [12.0 cm]

Product width

3.2 in [81.0 mm]

Product height

0.8 in [21 mm]

Product weight

1.7 oz [48.0 g]

Operating temperature

5C to 50C (41F to 122F)

Storage temperature

-20C to 85C (-4F to 185F)

Humidity

20~80% RH

Maximum documented data rate

10Gbps

Type and rate

USB 10Gbps

UASP support

Yes

MTBF — not warranty duration

2,684,396 Hours

Number of ports

2

Interface

PCI Express x4

Bus type

PCI Express

Card profile

Standard Profile (LP bracket incl.)

Industry standards

USB 3.2 Specifications; PCI Express Base 3.0 Specifications; Intel xHCI Specification Rev. 1.1

Chipset ID

ASMedia - ASM3142

Connector 1 (Quantity)

1

Connector 1

PCI Express x4

Connector 2 (Quantity)

1

Connector 2

USB-C (10Gbps, 4.5W)

Connector 3 (Quantity)

1

Connector 3

USB-A (10Gbps, 4.5W)

Connector 4 (Quantity)

1

Connector 4

SATA (15-Pin)

Documented selection limits

Match the exact host interface, peripheral/device protocol, connector, firmware, OS/driver and power requirements before ordering. Published maximum rates are interface limits, not guaranteed application throughput. No universal device or current/future OS compatibility is implied. This is a PCI Express USB host-controller card, not an external USB hub. Match electrical PCIe generation/lane width and physical slot/profile. Per-port and aggregate bandwidth/power depend on the controller topology and auxiliary power. USB-C ports do not imply USB Power Delivery or display output.

Specification source: StarTech.com ↗
Checked against documentation: 16.10.2026