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Green circuit board with four blue USB-A ports and a gold PCIe edge connector

STARTECH

STARTECH PEXUSB314A2V2 4-Port USB 3.2 Gen 2 PCIe Expansion Card

SKU CH-Y17N-66XW5 MPN PEXUSB314A2V2

Adds four USB 3.2 Gen 2 Type-A ports at up to 10 Gbps each via a PCIe x4 slot with dual controllers for up to 20 Gbps total bandwidth

  • TypePCI Express to USB Card
  • External USB Ports4 x USB 3.2 USB Type-A (9 pin, Gen 2, 10 Gbps)
  • StandardUSB 3.1 Specification Rev. 1.0 USB Specification Rev. 2.0 PC
  • Data Transfer RateUSB 3.2 Gen 2 - 10 Gbit/s
  • Operating Systems SupportedWindows 7, 8, 8.1, 10 Windows Server 2012 R2, 2016, 2019 mac
  • CompatibilityPCI Express enabled computer or server with a PCI Express x4
  • Four USB-A ports at 10Gbps each for fast external storage
  • Dual ASM3142 controllers deliver up to 20Gbps total bandwidth
  • Optional SATA power supplies up to 4.5W per port for demanding drives
  • Works with Windows, macOS and Linux on a PCIe 2.0 x4 slot
  • Standard-profile card fits full-height chassis measuring 5.9 x 4.7 inches

Four-port USB 3.2 Gen 2 expansion card

The STARTECH PEXUSB314A2V2 adds four USB Type-A ports running at 10 Gbps each to a desktop or server. It uses two ASM3142 controllers to deliver up to 20 Gbps of aggregate bandwidth across the card. The board fits a standard-profile PCI Express x4 slot or larger and supports Windows, macOS and Linux kernels from 3.5 onward. It targets users who need multiple high-speed connections for external storage or peripherals.

Thermals noise and power draw

The card draws power from the PCI Express slot and an optional SATA power connector for additional current. Total USB power output is rated at 4.5 W at 5 V and 0.9 A per port under the USB 3.2 Gen 2 specification. No active cooling is present, so the board relies on case airflow for thermal management. Acoustic output is negligible because there are no moving parts on the adapter.

Build quality and connectors

The printed circuit board measures 0.7 by 5.9 by 4.7 inches and weighs 4.4 oz, using a full-profile bracket already installed. Four integrated Type-A ports sit along the rear edge for direct cable attachment. An optional SATA power input sits on the board to supplement slot power when multiple bus-powered devices are connected. The dual-controller layout helps maintain bandwidth when mixed-speed devices are used simultaneously.

Points forts

  • Four USB-A ports at 10Gbps each for fast external storage
  • Dual ASM3142 controllers deliver up to 20Gbps total bandwidth
  • Optional SATA power supplies up to 4.5W per port for demanding drives
  • Works with Windows, macOS and Linux on a PCIe 2.0 x4 slot
  • Standard-profile card fits full-height chassis measuring 5.9 x 4.7 inches

Caractéristiques

BrandStarTech.com
ModelPEXUSB314A2V2
TypePCI Express to USB Card
External USB Ports4 x USB 3.2 USB Type-A (9 pin, Gen 2, 10 Gbps)
StandardUSB 3.1 Specification Rev. 1.0
USB Specification Rev. 2.0
PCI Express Base Specification Rev. 2.0
Intel xHCI Specification Rev. 1.1
UASP (USB Attached SCSI Protocol) Rev. 1.0
Data Transfer RateUSB 3.2 Gen 2 - 10 Gbit/s
Operating Systems SupportedWindows 7, 8, 8.1, 10
Windows Server 2012 R2, 2016, 2019
macOS 10.13 to 10.15, 11.0
Linux 3.5 or later LTS version only
CompatibilityPCI Express enabled computer or server with a PCI Express x4 slot or higher (x8, x16)
Optional SATA power connector
Note:
This card can share up to 20Gbps of bandwidth (up to 10Gbps, per port). However, the maximum throughput of the card is limited by the maximum throughput of the PCI-Express interface it's connected through
The available bandwidth (10Gbps) is shared equally between the two ports.
SpecificationsPorts: 4
Interface: PCI Express
Bus Type: USB 3.2 Gen 2 10Gbps
Card Type: Standard Profile
Port Style: Integrated on Card
Chipset ID: ASMedia - ASM3142, ASMedia - ASM1812
Total USB Power Output: 4.5W (5V @ 0.9A) nominal, per port - Ports trip before 2.1A (10.5W) for Over-Current Protection
Maximum Data Transfer Rate: 10Gbps per port
Type and Rate: USB 3.2 Gen 2 - 10 Gbit/s
UASP Support: Yes
MTBF: 40,000 Hours
FeaturesUSB PCIe card w/ 4x USB-A up to SuperSpeed 10Gbps per port
2x ASM3142 chips (2 ports/controller) w/ up to 20Gbps total bandwidth
USB 3.1/3.2 Gen 2 expansion card
Upgraded version of our popular USB card PEXUSB314A2V
USB PCI Express adapter card has Multiple INs for max bandwidth w/mixed-speed devices
Ideal for SSDs/HDDs/NVMe
Optional SATA power for up to 4.5W per port
Install add-on card in full profile PCI-e 2.0 x4 slot
Windows/Linux/macOS
Dimensions0.7" x 5.9" x 4.7"
Weight4.4 oz.
Package ContentsUSB 3.1 Card
Quick-Start Guide
Full Profile Bracket (Installed)
Poids d’expédition0.18 kg
Dimensions du colis207 × 145 × 38 mm

Questions sur cet article

How do I install the PEXUSB314A2V2 in a PCIe x4 slot and what step is often missed?

Insert the card into a PCIe 2.0 x4 or higher slot, secure the full-profile bracket, then connect the optional SATA power cable to deliver up to 4.5W per port; many builders forget the SATA power link.

What maintenance or replacement will the PEXUSB314A2V2 need later?

No scheduled maintenance is required; if a port fails the entire card is replaced since the two ASM3142 controllers and four Type-A ports are soldered on-board.

What limit appears first on the PEXUSB314A2V2 during sustained transfers?

The PCIe 2.0 x4 host link caps total throughput at 20Gbps, so combined traffic across all four 10Gbps ports cannot exceed that ceiling.

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