Products / PCI Express Expansion / PCIe Docking / PCIe x4 to PCIe x1 Slot


PCI Express x4 to four PCI Express x1 slots Docking System

IP4X-D1X20|PCI Express x4 to four PCI Express x1 slots Docking System
  • Two 5.25" ODD (Optical Disk Drive) form factor
  • Four PCIe x1 slots
    • Supports 1-lane PCI Express Bandwidth
    • Compliant with PCI Express base specification revision 2.0
    • PCIe Gen 2: 5 GT/s
  • Provides the PCI Express expansion solution for PCI Express x1 host cards

IP4X-D1X20 is a PCI Express (PCIe) x4 to Four PCIe x1 slots docking system. It provides one upstream port supporting x4, and four downstream ports that support x1 operation. IP4X-D1X20 is integrated by the following three key parts (IP4X-PCIE4XE31, DB525-PCIE2XD1X20, CB-00592).

  • IP4X-PCIE4XE31
    • Internal four PCIe x1 to PCIe x4 Gen 2 Switch Host Card..
  • Two DB525-PCIE2XD1X20
    • Two PCI Express x1 slots Add-On card docking bay.
  • Two CB-00592
    • USB 3.0 2-in-1 Female (10X2_19pin) Cable, L = 60cm.

Utilizing the standard PCI Express Switch, the 8-Lane/5-Port PCI Express Gen 2 (5 GT/s) Switch provides the most efficient fan-out solution for the following configuration:

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 Ports
    • 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
  • 64.5(H)x81(L) mm
  • NW: 43.6g


Upstream host connector
  • One dual-lane Internal PCIe ports ( IOI Proprietary)
    • 10X2_19pin Header (Pitch=2.0mm)
    • 2-lane PCIe (Two PCIe x1)

Downstream Internal PCIe bus interface

  • Two PCIe x1 slots
  • Supports 1-lane PCI Express bandwidth

Power connector

  • One SATA 15pin power connector
Form factor
  • One 5.25" ODD form factor
  • 146.6(W) x 42(H) x 175 (D) mm
  • NW: 343g
Kit includes


  • IP4X-PCIE4XE31
  • Two DB525-PCIE2XD1X20
  • Two CB-00592
  • Overview