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Green circuit board with metal bracket and two blue USB ports

SIIG, Inc

SIIG, Inc JU-P20412-S2 PCI Express to 2-Port USB 3.0 expansion card

SKU CH-NKTS-H7SQD MPN JU-P20412-S2

Adds two USB 3.0 Type-A ports to a PCIe desktop, delivering up to 5Gb/s transfer rates with NEC chipset and backward compatibility

  • External USB ports2 x Type-A USB 3.0
  • Supported standardsUSB 3.0
  • Transfer speedUp to 5Gb/s
  • Supported operating systemsWindows 7 (32-/64-bit) / Vista (32-/64-bit) / XP (32-/64-bit
  • Product typePCI Express to USB Card
  • DetailsCompliant with Universal Serial Bus 3.0 Specification, Revis
  • Adds two USB 3.0 ports to a PCIe desktop
  • Up to 5Gb/s transfer rate for high-bandwidth devices
  • Backwards compatible with USB 1.0/1.1/2.0 peripherals
  • PCI Express 2.0 interface with NEC chipset
  • Supports Windows 7, Vista and XP 32/64-bit

Two SuperSpeed USB 3.0 ports for desktop PCs

This PCI Express expansion card adds two Type-A USB 3.0 ports to a desktop computer with an available PCIe slot. It targets users who need to connect high-bandwidth peripherals such as external hard drives or flash drives to older systems lacking native USB 3.0 support. The card uses a NEC chipset and complies with the USB 3.0 Revision 1.0 and PCI Express Base Specification Revision 2.0 standards.

Passive cooling and bus-powered operation

The card operates without an active fan, relying on passive heat dissipation within the chassis for silent running. Power is drawn directly from the PCI Express slot, so no external power connector or separate adapter is required. Typical power consumption remains low during normal file transfers and peripheral use, keeping thermal impact on the system minimal.

Low-profile bracket and legacy OS drivers included

A low-profile bracket is supplied for installation in slim or small-form-factor cases where a full-height bracket would not fit. Driver support covers Windows XP, Vista and 7 in both 32-bit and 64-bit editions, allowing the card to function on older operating systems still found in some industrial or legacy workstations. The board is RoHS-compliant.

How it compares

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

Price $32.99
Typical for this category: the median of 891 items is $30.99.

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Specifications

Product
Brand nameSIIG
Model nameJU-P20412-S2
Product typePCI Express to USB Card
Performance
Transfer speedUp to 5Gb/s
Connectivity
Supported standardsUSB 3.0
Ports & slots
External USB ports2 x Type-A USB 3.0
Size & build
Shipping weight0.91 kg
Package size248 × 197 × 59 mm
Compatibility
Supported operating systemsWindows 7 (32-/64-bit) / Vista (32-/64-bit) / XP (32-/64-bit)

Questions about this item

How do I install the JU-P20412-S2 card and which step is often missed?

Insert the card into an available PCI Express x1 or wider slot, secure the bracket screw, then install the NEC chipset driver before connecting any USB 3.0 devices; skipping the driver install leaves the ports running at USB 2.0 speeds.

What maintenance or replacement will the JU-P20412-S2 need over time?

No scheduled maintenance is required; if a port becomes loose or the NEC chipset fails, the entire card must be replaced as individual components are not serviceable.

What limit appears first when I run both USB 3.0 ports at full 5Gb/s throughput?

The PCI Express 2.0 x1 link caps total bandwidth at 5Gb/s, so simultaneous maximum-speed transfers on both ports will share that single-lane ceiling.

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