Products / PCI Express Expansion / PCIe Docking / PCIe x4 to PCIe x4 (x2 mode) Slot


PCI Express x4 to two PCIe x4 slots (x2 mode) Docking System

DIP2X-D2X20|PCI Express x4 to two PCIe x4 slots (x2 mode) Docking System
  • 5.25" ODD (Optical Disk Drive) form factor
  • Two PCIe x4slots (x2 mode)
    • Supports 2-lane PCI Express Bandwidth
    • Compliant with PCI Express base specification revision 2.0
    • PCIe Gen 2 (5.0GT/s)
  • Provides the PCI Express expansion solution for PCI Express x2 host cards

DIP2X-D2X20 is a PCI Express (PCIe) x4 to two PCIe x4 slots (x2 mode) docking system. It provides one upstream port supporting x4, and two downstream ports that support x2 operation. DIP2X-D2X20 is integrated by the following three key parts (DIP2X-PCIE4XG210, DB525-DIP2XD2X20, CB-00592).

  • DIP2X-PCIE4XG210
    • Two Internal PCIe x2 to PCIe x4 Gen 2 Switch Host Card.
  • DB525-DIP2XD2X20
    • Two PCI Express x4 slots (x2 mode) 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/3-Port PCI Express Gen 2 (5 Gbps) 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 (PCIe x2)
  • Each Dual-lane Internal PCIe Port
    • PCIe Gen 1 (2.5GT/s)
    • PCIe Gen 2 (5.0GT/s)
Key Features
  • Industry Specifications Compliance
    • PCI Express® Base Specification, Revision 2.1
    • PCI Express CEM Specification, Revision 2.0
    • PCI-to-PCI Bridge Architecture Spec., Rev 1.2
    • Advanced Configuration Power Interface (ACPI) Specification
    • EEPROM interface support
  • PCISIG PCI Express 2.1 certificated
  • Integrated 100MHz Clock buffer for each downstream port
  • Reliability, Availability and Serviceability
    • Supports Data Poisoning and End-to-End CRC
    • Advanced Error Reporting and Logging
  • Device State Power Management
    • Supports D0, D3Hot and D3Cold device power states
  • Advanced Power Savings
    • Empty downstream ports are set to idle
  • Programmable driver current and de-emphasis level at each individual port
  • Port Arbitration: Round Robin (RR), Weighted RR and Time-based Weighted RR
  • Extended Virtual Channel capability
    • Two Virtual Channels (VC) and Eight Traffic Class (TC) support
    • Independent TC/VC mapping for each port
  • Supports Isochronous Traffic
    • Isochronous traffic class mapped to VC1 only
  • 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
  • Power Dissipation: 1.1 W typical in L0 normal mode (Including clock buffer Pd)
  • 150ns typical latency for packet running through switch without blocking
  • Link Power Management
    • Supports L0, L0s, L1, L2, L2/L3Ready and L3 link power states
    • Active state power management for L0s and L1 states
    • Supports PCI-PM
  • Supports Device Specific PME Turn-Off Message for each downstream port
  • Support Access Control Service (ACS) for peer-to-peer traffic
  • Support Address Translation (AT) packet for SR-IOV application
  • Support OBFF and LTR
Computer Platform Requirements Desktop computer equipped with a PCIe 2.0/3.0 x4, x8, x16 slot


Upstream host connector
  • Two dual-lane Internal PCIe ports ( IOI Proprietary)
    • 10X2_19pin Header (Pitch=2.0mm)
    • 2-lane PCIe (PCIe x2)

Downstream Internal PCIe bus interface

  • Two PCIe x4 slots (x2 mode)
  • Supports 2-lane PCI Express bandwidth

Power connector

  • One SATA 15pin power connector Note: it requires power (+12V, +5V, +3.3V)
Form factor
  • One 5.25" ODD form factor
  • 146.6(W) x 42(H) x 175 (D) mm
  • NW: 352g

Application :

For SATAIII (6Gbps) to PCIe x2 Gen2 Host Card



Kit includes


  • DIP2X-PCIE4XG210
  • DB525-DIP2XD2X20
  • Two CB-00592
  • Overview
Optional Accessories
  • Low Profile PCI Bracket (BR-00226-01)