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

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. 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. The PEXUSB321C is a professional-grade interface card from StarTech.com, positioned in the mid-range market.

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.