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Green circuit board with metal bracket, two rectangular USB-A ports and two oval USB-C ports along the edge

STARTECH

STARTECH PEXUSB312A2C2V 4-port USB 3.2 Gen 2 expansion card

SKU CH-74M3-1AWER MPN PEXUSB312A2C2V

Adds four 10 Gbps USB 3.2 Gen 2 ports — two Type-A and two Type-C — via a PCIe 3.0 x4 slot with dual controllers for 20 Gbps total bandwidth and optional SATA power delivering up to 15 W per Type-C

  • TypePCI Express USB Card
  • External USB Ports2 x USB 3.2 Gen 2x1 USB Type-A (9 pin, 10 Gbps) 2 x USB 3.2
  • Internal Ports1 x SATA Power (15 pin)
  • StandardIndustry Standards: PCI Express Base Specification Rev. 3.0
  • Operating Systems SupportedWindows 7, 8, 8.1, 10 Windows Server 2008 R2, 2012 R2, 2016,
  • SpecificationsPorts: 4 Bus Type: USB 3.2 Gen 2 10Gbps Interface: PCI Expre
  • Dual ASM3142 controllers deliver 20Gbps total bandwidth across four ports
  • Two USB-C and two USB-A ports each run at 10Gbps for fast external storage
  • Optional SATA power supplies 15W to USB-C and 4.5W to USB-A ports
  • Fits a PCI Express 3.0 x4 slot with full-profile bracket included
  • Compatible with Windows, Linux and macOS including Big Sur 11.0

Four-port USB 3.2 Gen 2 card with dual controllers

The STARTECH PEXUSB312A2C2V installs in a PCI Express 3.0 x4 slot and presents two USB Type-A and two USB Type-C ports, each rated at 10 Gbps. Two ASM3142 controllers split the four ports into pairs so that mixed-speed devices do not reduce each other's throughput. It is aimed at desktop or server builders who need additional high-speed USB connectivity for external SSDs, docks or peripherals.

Dual-controller layout preserves bandwidth per

Each controller manages one Type-A and one Type-C port, allowing simultaneous 10 Gbps operation on both ports of a pair without contention. The card supports UASP 1.0 for lower CPU overhead on attached storage. An optional SATA 15-pin power connector raises Type-C port power to 15 W and Type-A ports to 4.5 W, useful for bus-powered drives that exceed standard slot limits.

Standard-profile bracket and broad OS support

The card ships with a full-profile bracket already fitted and measures 0.90 by 4.40 by 3.30 inches, weighing 0.18 lb. Supported operating systems include Windows 7 through 10, Windows Server 2008 R2 through 2019, Linux kernels 3.5 to 4.11.x LTS, and macOS 10.13 through 11.0. A quick-start guide is included. Builders needing low-profile brackets or newer Linux kernel support should look elsewhere.

Points forts

  • Dual ASM3142 controllers deliver 20Gbps total bandwidth across four ports
  • Two USB-C and two USB-A ports each run at 10Gbps for fast external storage
  • Optional SATA power supplies 15W to USB-C and 4.5W to USB-A ports
  • Fits a PCI Express 3.0 x4 slot with full-profile bracket included
  • Compatible with Windows, Linux and macOS including Big Sur 11.0

Caractéristiques

BrandStarTech.com
ModelPEXUSB312A2C2V
TypePCI Express USB Card
External USB Ports2 x USB 3.2 Gen 2x1 USB Type-A (9 pin, 10 Gbps)
2 x USB 3.2 Gen 2x1 USB Type-C (24 pin, 10 Gbps)
Internal Ports1 x SATA Power (15 pin)
StandardIndustry Standards:
PCI Express Base Specification Rev. 3.0
USB 3.2 Specifications
UASP (USB Attached SCSI Protocol) Rev. 1.0
Operating Systems SupportedWindows 7, 8, 8.1, 10
Windows Server 2008 R2, 2012 R2, 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) macOS Big Sur (11.0)
SpecificationsPorts: 4
Bus Type: USB 3.2 Gen 2 10Gbps
Interface: PCI Express
Card Type: Standard Profile
Port Style: Integrated on Card
Total USB Power Output:
USB-C Power Output - 15W
USB-A Power Output - 4.5W
Maximum Data Transfer Rate: 10Gbps
Type and Rate: USB 3.2 Gen 2 - 10 Gbit/s
UASP Support: Yes
MTBF: 1,677,495 Hours
Dimensions0.90" x 4.40" x 3.30"
Weight0.18 lb.
Package ContentsPCI Express USB Card
Full Profile Bracket (Installed)
Quick-Start Guide
Poids d’expédition0.14 kg
Dimensions du colis170 × 142 × 30 mm

Questions sur cet article

Will the SATA power connector need replacing during the card's life?

The on-board 15-pin SATA power connector is a passive socket with no moving parts; it only needs attention if the cable or PSU connector wears out.

What limits sustained throughput when all four ports run at 10 Gbps?

The PCI Express 3.0 x4 host link caps aggregate bandwidth at roughly 20 Gbps, so simultaneous full-speed transfers on all ports will contend for that ceiling.

How hot or noisy does the card get during all-day operation?

The card has no fan and draws power only through the slot and optional SATA connector; it runs silently and stays at typical PCB temperatures inside a ventilated chassis.

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