Products/ Host Cards / PCIe x4 / USB 3.1 Gen 1 (USB 3.0)


Quad Channel 8-port (2-port x 4) USB 3.0 to PCI Express x4 Gen 2 Host Card

  • 5.25" ODD Form Factor
  • Host Bus: PCIe x4 Gen 2 (5.0 GT/s)
    • Compliant with PCI Express Base Specification Revision 2.0
  • Quad independent USB 3.0 Host Controllers
    • Compliant with Universal Serial Bus 3.0 specification Revision 1.0
    • Compliant with Intel’s eXtensible Host Controller Interface (xHCI) specification Revision 1.0
    • USB 3.0 Host Controller supports two downstream ports
  • Eight USB 3.0 Cable Ports (A-type Receptacle)

    USB 3.0 Standard A-type lock mechanism

    • Provides USB 3.0 cable port lock mechanism

The U3X4-PCIE4XE303 is an Quad channel 8-port (2-port x 4) USB 3.0 to PCI Express x4 Gen 2 Host Card.

U3X4-PCIE4XE303 is integrated by the following three key parts (IP4X-PCIE4XG201,DU3X2-IPCIE2XG201, CB-00592).

  • IP4X-PCIE4XE31
    • Internal four PCIe x1 to PCIe x4 Gen 2 Switch Host Card.
  • DU3X2-IPCIE2XG201
    • Quad PCI Express to USB 3.0 Single Chip Host Controllers (Renesas uPD720202; USB IF TID 380000043).
  • Two CB-00592

Utilizing the standard PCI Express Switch, the 8-Lane/5-Port PCI Express Switch provides the most efficient fan-out solution for integrating quad PCI Express to USB 3.0 Single Chip Host controllers into a small board design. Each USB 3.0 to PCI Express Single Chip Host controller takes advantages of 5 Gbps burst rate of 4-lane PCI Express bus in both directions and is fully compliant with PCI Express Base specification r2.0. This solution provides full PCI Express and USB 3.0 functionality and performance.

Technical Specifications


Upstream PCIe interface
  • 4-lane PCI Express
    • PCIe Gen 1 (2.5GT/s)
    • PCIe Gen 2 (5.0GT/s)
Downstream PCIe interface
  • Two IOI Proprietary Dual-lane Internal PCIe Ports (PCIe-1~2)
    • 10X2_19pin Header (Pitch=2.0mm)
    • 2-Lane PCIe (Two PCIe x1)
  • Each Dual-lane Internal PCIe Port
    • PCIe Gen 1 (2.5GT/s)
    • PCIe Gen 2 (5.0GT/s)
Key Features
  • Standards compliant
    • Compliant with PCI Express Base Specification Revision 2.1
    • Compliant with PCI Express CEM Specification Revision 2.0
    • Compliant with PCI-toPCI Bridge Architecture Specification Revision 1.2
    • Compliant with Advanced Configuration Power Interface (ACPI) Specification
    • PCI Power Management Spec r1.2
  • PCI Express Power Management
    • Link power management states: L0, L0s, L1, L2/L3 Ready, and L3
    • Device states: D0 and D3hot
    • Active state power management for L0s and L1 states
  • Port Arbitration Round Robin (RR) and Weighted RR and Time-based Weighted RR
  • Extended Virtual Channel capability
    • Two Virtual Channels (VC) and Eight Traffic Class (TC) support
    • Disabled VCs’ buffer is assigned to enabled VCs for resource sharing
    • Independent TC/VC mapping for each port
    • Provides VC arbitration selection: Strict Priority, Round Robin (RR) and Programmable Weighted Round-Robin
  • Supports Isochronous Traffic
    • Isochronous traffic class mapped to VC1 only
    • Strict time based credit policing
  • Supports “Cut-through”(Default) as well as “Store and Forward” mode for switching packets
  • Peer-to-peer switching between any two downstream ports
  • Supports up to 512-byte maximum payload size (setting to 256-byte)
  • Enhanced Features
    • 150ns typical latency for packet running through switch without blocking
    • Supports Access Control Service (ACS) for peer-to-peer traffic
    • Supports Address Translation (AT) packet for SR-IOV application
    • Supports OBFF and LTR
Computer Platform Requirements Desktop computer equipped with a PCIe 2.0/3.0 x4, x8, x16 slot
Physical Dimensions
  • 64.5(H)x81(L)mm
  • NW: 43.6g


PCI Express
(IOI Proprietary)
  • Two Dual-lane Internal PCIe Ports (IOI Proprietary)
    • 10X2_19pin Header (Pitch=2.0mm)
    • PCIe x2 (Two PCIe x1)
  • Throughput of each lane
    • PCIe Gen 2: 5 Gbps
  • Compliant with PCI Express Base Specification Revision 2.0
USB Features
  • Compliant with USB 3.0 Specification Revision 1.0
  • Compliant with Intel’s eXtensible Host Controller Interface (xHCI) specification Revision 1.0
  • Supports UASP (USB Attached SCSI Protocol)
  • Supports two downstream ports
  • Each USB port supporting SS/HS/FS/LS data rates (5Gbps/480Mbps/12Mbps/1.5Mbps)
USB Data Transfer Rate
  • Low-speed (1.5 Mbps)
  • Full-speed (12.0 Mbps)
  • High-speed (480.0 Mbps)
  • Super-speed (5.0 Gbps)
Number of Ports

Eight USB 3.0 (Standard A-type Receptacle) cable ports (Provides USB 3.0 cable port lock mechanism)

USB Bus Power Input (5V & 12V)

Either Big IDE 4-pin DC Power Connector
or/and SATA 15pin Power Connector

Physical Dimensions
  • 5.25" ODD Form Factor
  • 146.6(W) x 42(H) x 89.5 (D) mm
  • NW: 306.5g

Quad Channel 8-port USB 3.0 Host Controllers

  • U3X4-PCIE4XE303
    • IP4X-PCIE4XE31
    • DU3X2-IPCIE2XG201
    • Two CB-00592
Computer Platform
  • Computer with PCI Express slot (x4, x8, x16)

For the best performance (5.0 GT/s), It should be installed in a PCIe Gen 2 compliant slot in the host computer.  Most computers have PCIe Gen 2 (5.0 GT/s) throughput on x8 or x16 slots.
A PCIe Gen 1 compliant slot reaches up to 2.5 GT/s throughput

Operating System Requirements
  • If OS is Windows 8 or later , there are inbox driver for Renesas USB 3.0 Host Controller. OS will detect the presence of new hardware and then install Renesas USB 3.0 Host Controller driver automatically.
  • USB 3.0 Host Drivers Kit (x86 and x64) for
    • Windows XP
    • Windows Vista
    • Windows 7
    • Windows Server 2008 Release 2
Kit includes


  • IP4X-PCIE4XE31
  • DU3X2-IPCIE2XG201
  • Two CB-00592 --- Female 19pin to Female 19pin Cable, L=600mm
Optional Accessories
  • Low Profile PCI Bracket (BR-00194-34-1020) for IP4X-PCIE4XE31
Version: Date: 2012/9/28
Content: USB 3.0 Host Controller Driver Kit (x86 and x64) For Windows XP, VISTA, 7 and Server 2008 Download