This article covers StarTech.com USB 3.0 4ポート増設PCIeカード 4x USB 3.0 拡張用PCIe x1 接続ボード SATA(15ピン)電源端子付き PEXUSB3S4V.

Overview

The StarTech.com PEXUSB3S4V is a PCI Express x1 interface card that adds four USB 3.0 ports to any desktop PC. It's a straightforward solution when your motherboard's built-in USB ports aren't enough, or when you want to upgrade older USB 2.0 ports to SuperSpeed 5Gbps. With UASP (USB Attached SCSI Protocol) support, this card can significantly improve transfer speeds for compatible external storage, especially SSDs. A low-profile bracket is included, making it suitable for both standard towers and compact Slimline cases.

Connectivity & Compatibility

This card uses a PCI Express 2.0 x1 interface and works in any standard PCIe x1, x4, x8, or x16 slot. It provides four external USB 3.0 ports in a stacked layout, with full backward compatibility for USB 2.0 and 1.1 devices. An onboard SATA 15-pin power connector allows the card to deliver up to 900mA per port when connected to a SATA power cable from the PSU, which is essential for power-hungry external drives. The controller is compliant with Intel xHCI rev0.95, meaning most modern operating systems (Windows, Linux, macOS) will recognize it without additional drivers.

Product Info

The PEXUSB3S4V has been a reliable workhorse in the USB expansion market for years, positioning itself as an entry-to-mid-range solution. It typically retails between $30 and $40 USD (or around ¥5,000–¥8,000 in Japan) and comes with a 2-year manufacturer warranty. The retail package includes the card with a full-height bracket pre-installed, plus a low-profile bracket for smaller cases. No additional cables are required beyond the SATA power connection if you need extra port power.

Best Use Cases

This card is ideal for several scenarios: Users needing more USB ports on a desktop PC: If your motherboard only has 2–4 USB 3.0 ports on the back I/O, this card instantly adds four more, perfect for connecting multiple external drives, printers, or VR headsets without needing a hub. External storage performance seekers: The UASP protocol reduces latency and improves throughput for external SSDs and high-speed HDDs. This is especially beneficial for creative professionals who frequently transfer large media files. * Compact system builders: With the low-profile bracket, the card fits easily in HTPC or small-form-factor cases. However, note that it requires an available PCIe slot — it is not compatible with laptops or Mini PCs without PCIe expansion.

Product Disclosure (Amazon)

  • Manufacturer: StarTech.com(スターテック)
  • Seller: ECカレント
  • Fulfilled by: ECカレント
  • ASIN: B009AT5SVS
  • Note: This article covers a manufacturer-made product based on Amazon listing details.