StarTech.com PEXUSB311EI · USB PCIe host card

MPN / P/N

PEXUSB311EI

Manufacturer designation

2-Port USB 3.1 (10Gbps) Card - USB-A, 1x External, 1x Internal - PCIe

Manufacturer conditions

The maximum throughput of this card is limited by the bus; interface. PCI Express Gen 1.0 max throughput is 2.5Gbps. PCI; Express Gen 2.0 max throughput is 5Gbps. PCI Express Gen; 3.0 max throughput is 10Gbps.; The available bandwidth (10Gbps) is shared equally between the; two ports.

System and cable requirements

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

Input voltage

12V DC

Output voltage

12V DC

Colour

Black

Material

Steel

Product length

3.5 in [90.0 mm]

Product width

0.7 in [18.0 mm]

Product height

4.7 in [12.0 cm]

Product weight

1.8 oz [51.0 g]

Operating temperature

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

Storage temperature

-20C to 60C (-4F to 140F)

Humidity

20~80% RH (Non-condensing)

Maximum documented data rate

10Gbps

Type and rate

USB 10Gbps

UASP support

Yes

Number of ports

2

Interface

USB 3.2 Gen 2

Bus type

PCI Express

Card profile

Standard Profile (LP bracket incl.)

Port Style

Integrated on Card

Industry standards

USB 3.1 Specification Rev. 1.0; USB Specification Rev. 2.0; PCI Express Base Specification Rev. 3.0; Intel xHCI Specification Rev. 1.1; UASP (USB Attached SCSI Protocol) Rev. 1.0

Chipset ID

ASMedia - ASM1142

Connector 1 (Quantity)

1

Connector 1

PCI Express x4

Connector 2 (Quantity)

1

Connector 2

USB-A (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