This article covers StarTech.com PCIeカード 1ポート USB-C 3.2 Gen 2x2 PEXUSB321C.

Overview

The StarTech.com PEXUSB321C is a PCIe expansion card that adds a single USB-C 3.2 Gen 2x2 port (up to 20Gbps) to your desktop PC. Powered by the ASMedia ASM3242 host controller and connected via PCIe 3.0 x4, it delivers blazing-fast data transfers for external SSDs and NVMe drives. It also provides up to 15W (5V/3A) of power delivery to connected devices. This card comes with both standard and low-profile brackets, making it compatible with a wide range of PC cases. It supports Windows 8 and later, Linux, and macOS, with automatic driver installation on Windows 8+ for a hassle-free setup.

Connectivity & Compatibility

The PEXUSB321C fits into a PCIe 3.0 x4 slot (also works in x16 slots) and is backward compatible with PCIe 2.0. The USB-C port supports USB 3.2 Gen 2x2 (20Gbps) and is backward compatible with USB 3.1, 3.0, and 2.0 devices. Note that it does not support DisplayPort Alt Mode for video output. Supported OS: Windows 8+, Linux, macOS Supported slots: PCIe 3.0 x4 (also fits x16) Supported devices: USB-C storage, hubs, peripherals UASP support improves storage device performance * Multiple IN support reduces bandwidth loss when connecting multiple devices (requires hub-side support)

Product Info

The PEXUSB321C is a professional-grade interface card from StarTech.com, positioned in the mid-range market. Its key advantage is delivering 20Gbps USB-C connectivity at an affordable price point. Release: 2021 Price: Approximately $60–$70 USD Warranty: Free, unlimited technical support from manufacturer Accessories: Standard bracket, low-profile bracket * Availability: , StarTech.com official store

Best Use Cases

Desktop users lacking USB-C ports: Ideal for connecting high-speed external SSDs or docks at full bandwidth. Creative professionals handling large files: 20Gbps transfers significantly reduce wait times for video, photo, or project data. * DIY PC builders: Easily add USB-C 3.2 Gen 2x2 to any motherboard that lacks it, without upgrading the entire system.

Product Disclosure (Amazon)

  • Manufacturer: StarTech.com(スターテック)
  • Seller: Startech Japan KK
  • Fulfilled by: Amazon
  • ASIN: B08T6FCF9S
  • Note: This article covers a manufacturer-made product based on Amazon listing details.