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StarTech.com PEXUSB312A3 2-Port USB PCIe Card with 10Gbps/port - USB 3.1/3.2 Gen 2 Type-A PCI Express 3.0 x2 Host Controller Expansion Card - Add-On Adapter Card - Full/Low Profile - Windows & Linux (PEXUSB312A3)
- USB PCIe card has ASM3142 controller (PCIe 3.0 x2) w/2x USB-A ports
- Up to 10Gbps/port
- USB 3.1/3.2 Gen 2 expansion card
- New version of PEXUSB312A2
- USB PCI Express adapter card supports Multiple INs for max bandwidth w/mixed-speed devices
- UASP optimizes performance w/ SSDs/HDDs/NVMe drives
- Supports USB 3.0/2.0 devices
- SATA power header provides up to 4.5W/port
- Add-on card w/ full or low-profile bracket incl.
- Win/Linux/macOS and auto drivers on Win 8 and up
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Overview
Specs
Reviews
Warranty & Returns
Warranty, Returns, And Additional Information
Warranty
- Limited Warranty period (parts): 1 year
- Limited Warranty period (labor): 1 year
- Read full details
Return Policies
- Return for refund until: January 31, 2027
- Return for replacement until: January 31, 2027
- This item is covered by Newegg.ca's Extended Holiday Return Policy.
- Read full return policy for details.
We want to ensure your holiday shopping this year is hassle-free. That’s why we’re automatically extending our return policies on almost every product! For purchases placed between November 1st, 2026 and December 31, 2026 you will have until January 31, 2027 to return your product.
Manufacturer Contact Info
- Manufacturer Product Page
- Manufacturer Website
- Support Phone: 1-800-265-1844
- Support Email: support@startech.com
- Support Website
- View other products from STARTECH
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The StarTech.com PEXUSB312A3 is a PCIe expansion card that adds two USB-A ports rated up to 10Gbps each, suited to desktop or server users who need more high-speed USB connectivity for external SSDs and other peripherals.
Recommended For
- Desktop users who regularly move large files between a USB-A external SSD or NVMe enclosure and their PC, and need a 10Gbps USB port where the motherboard lacks one.
- PC builders or workstation users adding two USB-A ports for high-speed external drives and other USB devices, with an available PCIe x4-or-larger slot.
- Users connecting a mix of USB storage and older USB 3.0 or USB 2.0 peripherals who want them on an add-in controller; the card supports those earlier USB standards and UASP storage devices.
- Small-form-factor desktop builders who need added USB-A ports and can use the included low-profile bracket in a compatible PCIe slot.
Spec Summary
| Attribute | Value |
|---|---|
| Best For | Adding two USB Type-A ports to a PCIe-equipped computer or server for connecting USB peripherals and storage devices |
| USB Ports And Data Transfer | Two USB 3.2 Gen 2 Type-A ports support data rates up to 10 Gbit/s per port and USB 3.0/2.0 devices; Multiple INs support mixed-speed devices |
| PCIe Interface And Controller | PCI Express x4 card with an ASMedia ASM3142 controller using a PCIe 3.0 x2 connection; requires a PCIe x4 slot or higher |
| Protocols And Standards | Supports UASP (USB Attached SCSI Protocol) 1.0, USB 3.2, PCI Express Base Specification 3.0, and Intel xHCI 1.1 |
| Power | Optional 15-pin SATA power connector; nominal USB output is 4.5 W per port (5 V at 0.9 A), with over-current protection specified above 2.0 A (10 W) |
| Operating System Compatibility | Windows 7, 8, 8.1, and 10; Windows Server 2012 R2, 2016, and 2019; macOS 10.13–10.15 and 11.0; Linux 3.5 or later LTS |
| Installation And Physical Details | Standard-profile card with a low-profile bracket included; 0.7 × 4.7 × 4.3 in, 2.8 oz, black |
| Model Identifiers | StarTech.com PEXUSB312A3 |