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Green circuit board with silver USB-C port and two metal brackets

EN-Labs

EN-Labs PCIe 3.0 to USB 3.2 Gen2x2 Type-C 20Gbps Expansion Card

SKU CH-WJ6S-PDW2P

Adds a single USB 3.2 Gen2x2 Type-C port running at 20Gbps through a PCIe 3.0 x4 slot, powered by a SATA connector and using an ASMedia ASM3242 controller

  • External USB ports1x USB Port
  • Product typePCI Express to USB Card
  • Adds a 20Gbps USB-C port via PCIe 3.0 x4 slot
  • Driver-free on Windows 10 and 11 with legacy OS support
  • Powered by SATA 15-pin for stable SSD and HDD operation
  • Includes full-profile and low-profile brackets for any case
  • Built on ASMedia ASM3242 chipset with XHCI 1.0 compliance

PCIe 3.0 x4 to USB 3.2 Gen2x2 Type-C adapter

This EN-Labs add-on card converts an available PCI Express 3.0 x4 slot into a single USB 3.2 Gen2x2 Type-C port rated at 20Gbps. It targets desktop builders who need one high-speed external connection for fast SSDs or HDDs without replacing their motherboard. The card fits x1, x4, x8 and x16 slots and uses the ASMEDIA ASM3242 controller. Driver-free operation is provided for Windows 10 and 11.

Full-profile and low-profile brackets included

Both bracket heights ship in the box so the card works in standard towers and slim cases alike. A SATA 15-pin power connector draws auxiliary current directly from the power supply, ensuring stable 20Gbps transfers under load. No extra software or cables are required beyond the SATA lead. The hardware presents a single rear Type-C port only.

PCIe 3.0 bandwidth limits sustained throughput

The x4 PCI Express 3.0 link caps total bandwidth below the port’s theoretical 20Gbps maximum, so real-world speeds with the fastest drives will be lower. The XHCI 1.0 host controller handles protocol duties but does not overcome the bus ceiling. Older Windows versions such as XP, Vista and 7 need manual driver installation. Buyers who want multiple high-speed ports or full 20Gbps saturation should look elsewhere.

How it compares

Measured against everything we stock in PCIe Expansion Cards, at today’s prices. Recalculated every night.

Price $28.99
Typical for this category: the median of 891 items is $30.99.

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Specifications

Product
Product typePCI Express to USB Card
Ports & slots
External USB ports1x USB Port

Questions about this item

Will the SATA 15-pin power connector on the EN-Labs PCIe 3.0 card need replacement over time?

The SATA 15-pin header draws power directly from the PSU; it is a standard cable connection with no serviceable parts on the card itself.

What limits the 20 Gbps USB 3.2 Gen2x2 port during sustained transfers?

The PCIe 3.0 x4 host link and the ASMEDIA ASM3242 controller set the maximum sustained throughput at 20 Gbps.

How much heat or noise does the ASMEDIA ASM3242 chipset produce when the card runs all day?

The controller uses advanced CMOS processes to reduce power consumption, so it runs cool and silent without a fan.

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