This article covers StarTech.com High Speed USB 2.0 4ポート増設PCI Expresカード ロープロファイル対応 外部ポート x3.
Overview
Running out of USB ports on your desktop PC? The StarTech.com PEXUSB4DP is a PCI Express expansion card that adds four USB 2.0 ports to your system. It features three external ports and one internal port, making it easy to connect external drives, printers, or even an internal card reader. With a maximum transfer rate of 480 Mbps, this card supports full USB 2.0 speed and is backward compatible with USB 1.0/1.1 devices. A dedicated power input delivers up to 500 mA per port, ensuring stable operation for bus-powered peripherals that might otherwise struggle.
Connectivity & Compatibility
The PEXUSB4DP uses a PCI Express x1 interface and comes with both low-profile and full-profile brackets, so it fits in standard and small-form-factor cases alike. It supports Windows and Linux out of the box, with WHQL-certified drivers for plug-and-play installation. The internal USB 2.0 header can be used for front-panel ports or internal devices, helping keep your case wiring tidy. Backward compatibility with USB 1.0/1.1 means older peripherals remain usable without any issues.
Product Info
Released around 2010, this card is still widely available through retailers like . Pricing sits around ¥6,000, which is modest compared to USB 3.0 alternatives. The manufacturer offers a standard 2-year warranty. Market positioning is entry to mid-range. While USB 2.0 isn't suitable for high-speed storage, it's perfectly adequate for keyboards, mice, printers, and other latency-insensitive devices.
Best Use Cases
Legacy peripheral users: If you still rely on older scanners, printers, or other USB 1.0/1.1 devices, this card offers reliable backward compatibility. Small form-factor builders: The included low-profile bracket makes installation in compact cases easy, and the internal port helps with cable management. * Stability-focused setups: The dedicated power input ensures consistent power delivery, making it ideal for bus-powered external HDDs or USB hubs that need stable current. ## Alternatives
A direct competitor is StarTech's own USB 3.0 card (PEXUSB3S4), which offers 5 Gbps speeds but costs roughly twice as much. The PEXUSB4DP is the better choice if you prioritize stability and legacy support over raw speed. Another option is an external USB 2.0 hub, but a PCI Express card provides dedicated bandwidth, reducing performance drops when multiple devices are connected simultaneously.
Things to Consider
This card is limited to USB 2.0 speeds, so it's not suitable for external SSDs or large file transfers. Make sure your use case doesn't require faster throughput. You'll need a free PCI Express x1 slot (or larger). Most motherboards accept x1 cards in x16 slots without issue. The dedicated power input requires a 4-pin FDD or Molex connector from your PSU. If your power supply lacks one, you may need an adapter.
Product Disclosure (Amazon)
- Manufacturer: StarTech.com(スターテック)
- Seller: Startech Japan KK
- Fulfilled by: Amazon
- ASIN: B002RL8V7E
- Note: This article covers a manufacturer-made product based on Amazon listing details.
