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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

  • TypePCI Express to USB Card
  • External USB Ports2 x Type-A USB 3.0
  • StandardUSB 3.0
  • Data Transfer RateUp to 5Gb/s
  • Operating Systems SupportedWindows 7 (32-/64-bit) / Vista (32-/64-bit) / XP (32-/64-bit
  • SpecificationsCompliant 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.

Highlights

  • 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

Specifications

BrandSIIG
ModelJU-P20412-S2
TypePCI Express to USB Card
External USB Ports2 x Type-A USB 3.0
StandardUSB 3.0
Data Transfer RateUp to 5Gb/s
Operating Systems SupportedWindows 7 (32-/64-bit) / Vista (32-/64-bit) / XP (32-/64-bit)
SpecificationsCompliant with Universal Serial Bus 3.0 Specification, Revision 1.0
Compliant with PCI Express Base Specification, Revision 2.0
NEC Chipset
RoHS-compliant
FeaturesQuickly adds two SuperSpeed USB (USB 3.0) ports to your PCIe-enabled desktop PC -- enhancing existing systems with the latest USB 3.0 technology
Works with high-bandwidth USB 3.0 devices, such as external hard disks, high resolution webcams, video surveillance cameras, digital video cameras, multi-channel audio and more...
Shipping weight0.91 kg
Package size248 × 197 × 59 mm

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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