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Green circuit board with gold PCIe edge connector and two USB-C ports on a metal bracket

STARTECH

STARTECH PEXUSB312C3 2-Port PCIe USB 3.1 Gen 2 expansion card

SKU CH-5BC5-MSBFP MPN PEXUSB312C3

Adds two USB-C ports with 10 Gbps throughput via a PCIe x4 slot, includes SATA power for high-draw devices and a low-profile bracket

  • TypePCI Express to USB Card
  • External USB Ports2 x USB Type-C (24 pin) USB 3.1 (10Gbps) Female
  • Internal Ports1 x SATA Power (15 pin) Plug
  • StandardUSB 3.1 Gen 2
  • Data Transfer Rateup to 10 Gbit/s
  • Operating Systems SupportedWindows 7, 8, 8.1, 10 Windows Server 2008 R2, 2012, 2016, 20
  • Add two high-speed USB-C ports with up to 10 Gbit/s throughput
  • Optional 15-pin SATA power connector supports high-power USB devices
  • Dual-profile bracket fits both standard and low-profile chassis
  • ASMedia ASM3142 chipset delivers USB 3.1 Gen 2 performance
  • Broad OS support across Windows, Linux and macOS versions

Two-Port USB-C Card

This PCI Express add-on card adds two USB Type-C ports that operate at the USB 3.1 Gen 2 standard with up to 10 Gbit/s throughput. It targets desktop or server builders who need modern USB-C connectivity on a platform that lacks native ports. The card installs in any PCI Express x4, x8 or x16 slot and includes a low-profile bracket for compact chassis.

Sustained Throughput

The ASMedia ASM3142 controller supports UASP and the USB 3.2 Rev 2.0 specification to maintain high transfer rates during extended file operations. An optional 15-pin SATA power connector supplies extra current for demanding peripherals so performance does not throttle under continuous load. Driver support spans Windows 7 through 10, Windows Server 2008 R2 through 2019, Linux 3.5 to 4.11.x LTS and macOS 10.13 to 10.15.

Dual-Profile Build

A standard-profile bracket comes fitted and a low-profile bracket is included, letting the same card fit full-height or slim enclosures without modification. The x4 edge connector seats securely in longer PCIe slots while the two integrated USB-C receptacles face the rear panel for clean cable routing. No internal USB headers are used; all connectivity is external.

Points forts

  • Add two high-speed USB-C ports with up to 10 Gbit/s throughput
  • Optional 15-pin SATA power connector supports high-power USB devices
  • Dual-profile bracket fits both standard and low-profile chassis
  • ASMedia ASM3142 chipset delivers USB 3.1 Gen 2 performance
  • Broad OS support across Windows, Linux and macOS versions

Caractéristiques

BrandStarTech.com
ModelPEXUSB312C3
TypePCI Express to USB Card
External USB Ports2 x USB Type-C (24 pin) USB 3.1 (10Gbps) Female
Internal Ports1 x SATA Power (15 pin) Plug
StandardUSB 3.1 Gen 2
Data Transfer Rateup to 10 Gbit/s
Operating Systems SupportedWindows 7, 8, 8.1, 10
Windows Server 2008 R2, 2012, 2016, 2019
Linux 3.5 to 4.11.x LTS version only
macOS Catalina (10.15)
macOS Mojave (10.14)
macOS High Sierra (10.13)
CompatibilityPCI Express enabled computer or server with a PCI Express x4 slot or higher (x8, x16)
SpecificationsConnector Type(s): 1 - PCI Express x4 Male
Bus Type: PCI Express
Card Type: Standard Profile (LP bracket incl.)
Chipset ID: ASMedia - ASM3142
Industry Standards: USB 3.2 Specification Rev. 2.0
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
Interface: USB 3.1 Gen 2
Port Style: Integrated on Card
Ports: 2
Maximum Data Transfer Rate: 10Gbps
UASP Support: Yes
Note: The card's USB-C ports are standard data throughput port. They do not support DP Alt Mode or USB Power Delivery.
The maximum thro
FeaturesTransfer files and access USB 3.1 Gen 2 devices faster, with up to 10Gbps of throughput
Optional SATA power connector for high power devices
Fits into standard or low-profile systems with a dual-profile design
Compliant with Universal Serial Bus 3.1 Gen 2 Specification
Compliant with UASP (USB Attached SCSI Protocol) Revision 1.0
Dimensions0.70" x 4.80" x 3.10"
Weight0.10 lbs.
Package Contents1 x USB 3.1 Card
1 x Low Profile Bracket
1 x Quick Start Guide
Poids d’expédition0.14 kg
Dimensions du colis152 × 127 × 51 mm

Questions sur cet article

How much heat or noise does the ASM3142 chipset produce when the card runs at 10Gbps all day?

The ASM3142 controller is a passive component with no fan, so it adds no audible noise; heat output is minimal and handled by the case airflow.

Does my power supply need a free 15-pin SATA connector for this card to work?

The optional 15-pin SATA power plug is only required when you attach high-power USB-C devices; the card draws slot power for the controller itself.

Will the x4 PCIe 3.0 link saturate if I keep an older PCIe 2.0 x8 slot?

The card requires a PCIe x4 slot or higher; in a 2.0 x8 slot the link negotiates to PCIe 2.0 x4, halving the maximum bandwidth to 5Gbps.

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