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Green circuit board with four blue USB-A ports and a PCIe x1 edge connector

EN-Labs

EN-Labs PCE4USB-RS4 4-port USB 3.0 expansion card

SKU CH-NHDN-7ZD4B

Adds four USB 3.0 Type-A ports through a PCI Express x1 slot using a NEC UPD720201 chipset for 5 Gbit/s speeds, includes a SATA power connector and low-profile bracket

  • External USB ports4-port USB 3.0
  • Product typePCI Express to USB Card
  • DetailsBus Type:PCI Express Type Standard:Profile (LP bracket incl.
  • Key featuresAdd 4 USB 3.0 ports through a PCI Express slot Compatible wi
  • Add four USB 3.0 ports via one PCI Express x1 slot
  • NEC UPD720201 chipset delivers 5 Gbit/s Super Speed transfers
  • Works in PCIe 1x, 4x, 8x or 16x slots
  • SATA 15-pin power connector for stable operation
  • Low-profile bracket included for small-form-factor builds

Four USB 3.0 ports via PCI Express

The EN-Labs PCE4USB-RS4 adds four USB Type-A 3.0 ports to a desktop through a single PCI Express x1 slot. It uses the NEC UPD720201 controller and is aimed at users who need more high-speed peripheral connections than the motherboard provides. The card fits full-profile brackets and works in x1, x4, x8 or x16 slots.

Fits a free PCIe slot and draws auxiliary power

Installation requires an available PCI Express slot of any width and a Molex 4-pin power connector from the power supply. The card draws supplementary power through that connector so the four ports can deliver full current without loading the slot alone. It frees up existing rear-panel ports for other devices.

Sustained 5 Gbit/s transfers

Under continuous load the controller maintains up to 5 Gbit/s per port and remains compliant with the USB 3.0 Super Speed specification. The chipset also supports USB 2.0, 1.1 and 1.0 devices at their native rates. Hot-plug operation is supported across all four ports.

How it compares

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

Price $17.99
Cheaper than about 75% of the 891 comparable items (median $30.99).

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Specifications

Product
Brand nameEn-Labs
Model namePCE4USB-RS4
Product typePCI Express to USB Card
Ports & slots
External USB ports4-port USB 3.0

Questions about this item

How many devices can run at full 5 Gbit/s before the PCIe 2.0 x1 link saturates?

The PCIe 2.0 x1 link provides 5 Gbit/s total bandwidth, so only one USB 3.0 port can sustain full speed; additional active ports share that throughput.

Does the NEC UPD720201 chipset need active cooling when all four ports transfer data continuously?

The card draws power from the PCIe slot and the onboard Molex 4-pin connector; no fan or heatsink is fitted, so sustained loads rely on case airflow alone.

Which power connector must the power supply provide for the extra Molex 4-pin input?

A standard Molex 4-pin peripheral connector from the PSU plugs into the card’s onboard male header to supplement slot power.

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