This article covers PCIe to 4 USB 3.2 および 4 Type C ポート拡張アダプタ カード デスクトップ接続用 20Gbps 高速転送 より多くのデバイス PCIe 拡張カード.

Overview

This expansion card adds four USB 3.2 Gen2×2 (20Gbps) Type-A ports and four USB 3.2 Gen2×2 Type-C ports to any desktop PC with an available PCIe slot. It combines an ASMedia ASM3142 bridge controller with two VIA VL822 hub controllers, allowing each port to operate at full speed independently. This design ensures that multiple high-bandwidth devices—such as external SSDs, video capture cards, or VR headsets—can be used simultaneously without creating a bottleneck. The card also emphasizes low latency, making it a good fit for gaming peripherals and real-time audio interfaces. Installation is straightforward: insert into a PCIe x4 or larger slot, and Windows or Linux will recognize the card with built-in drivers. It is an ideal solution for users who have run out of rear USB ports on their motherboard or who want to avoid routing front-panel cables. Note that it requires a free PCIe slot, so compact or small-form-factor builds may not have room. ## Specifications | Item | Specification | |------|--------------| | USB Standard | USB 3.2 Gen2×2 (20Gbps), USB 3.2 Gen2 (10Gbps), USB 2.0, USB 1.1 | | Max Transfer Speed | Up to 20Gbps per port (USB 3.2 Gen2×2) | | USB Ports | 4× USB-A, 4× USB-C | | Controller Chipset | ASM3142 (PCIe-USB bridge) + 2× VL822 (USB hub) | | Host Interface | PCI Express (x4 or wider recommended) | | OS Support | Windows 10/11, Linux (native drivers) | | Power Delivery | From PCIe slot (no external power required) |

Connectivity & Compatibility

The card works with any motherboard that has a PCIe x4 or larger slot. It will physically fit into an x1 slot, but bandwidth will be severely limited. The ASM3142 chipset is natively supported by Windows and Linux, so no manual driver installation is needed. The USB-C ports support USB 3.2 Gen2×2 data transfer but do not provide Power Delivery—they are data-only. Bus-powered devices draw power from the PCIe slot; if you plan to connect many power-hungry peripherals simultaneously, consider using a powered hub in addition.

Product Info

This card is a third-party product sold on , with an estimated release in 2024. The price is around ¥9,162 (excluding tax), positioning it as an affordable entry-to-mid-range solution. Warranty terms vary by seller—check before purchase. The package includes only the card; no driver CD or manual is included. It belongs to the budget-to-mainstream tier for users seeking a simple USB expansion without costly Thunderbolt add-ons. View on

Best Use Cases

Creative professionals with multiple external SSDs: When editing video or transferring large files, having dedicated 20Gbps bandwidth per port prevents slowdowns and speeds up workflow. The card’s low latency also helps with real-time audio interfaces. Gamers short on motherboard USB ports: Connect a VR headset, controller, high-polling-rate mouse, and webcam all at once without unplugging. The independent port controllers reduce game stutter caused by USB contention. * Users transitioning to USB-C peripherals: With four USB-C ports, this card is perfect for those who regularly connect modern smartphones, tablets, or USB-C drives, eliminating the need for adapters or hub daisy-chaining.