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Blue rectangular circuit board with HDMI, USB, Ethernet, CSI, DSI, M.2 and microSD connectors

Bazarc

Bazarc CM4-IO-BASE-A server accessory BCM2711 5V 3A

SKU CH-CTJS-KQS9N MPN CM4-IO-BASE-A

Expansion board for Raspberry Pi Compute Module 4 with BCM2711 chip, Gigabit Ethernet, HDMI, USB, CSI, DSI, M.2 and microSD interfaces

  • TypeOther
  • Quad-core BCM2711 processor powers demanding compute tasks
  • Gigabit Ethernet with IEEE 1588 support enables precise network timing
  • PCIe expansion slot allows flexible module additions
  • 5 V 3 A supply delivers stable power to the module
  • Blue board design aids quick visual identification

Dedicated CM4 Base Board

The Bazarc CM4-IO-BASE-A is a purpose-built expansion board for the Raspberry Pi Compute Module 4. It provides a stable B-to-B connector interface and a 5V 3A power input to support the BCM2711 processor. The board breaks out HDMI-compatible video, Gigabit Ethernet, USB, CSI, DSI and fan headers for rapid prototyping.

Engineers needing full I/O access

This board suits developers who require direct access to every CM4 interface including PCIe and M.2 expansion in a compact form factor. It is not for users who only need a basic carrier with fewer ports or those building inside enclosures that cannot accommodate the full breakout layout.

BCM2711 quad-core Cortex-A72 processor

The on-board BCM2711 chip delivers 64-bit performance with four Cortex-A72 cores for compute-intensive tasks. Gigabit Ethernet with IEEE1588 support enables precise network timing. An M.2 slot and PCIe interface allow flexible storage or accelerator additions.

Highlights

  • Quad-core BCM2711 processor powers demanding compute tasks
  • Gigabit Ethernet with IEEE 1588 support enables precise network timing
  • PCIe expansion slot allows flexible module additions
  • 5 V 3 A supply delivers stable power to the module
  • Blue board design aids quick visual identification

Specifications

TypeOther

Questions about this item

What mounting holes or standoffs does the CM4-IO-BASE-A need to secure the Compute Module 4?

The board uses a B-to-B connector to mate with the Compute Module 4, replacing the gold-finger design of earlier CM boards for a more stable mechanical connection.

Which step is most often missed when installing the CM4-IO-BASE-A with a Compute Module 4?

Aligning the Compute Module 4 precisely on the B-to-B connector before pressing down evenly; misalignment can bend pins and prevent the board from booting.

Which on-board interfaces on the CM4-IO-BASE-A may need a cable or module replacement over time?

The CSI and DSI flat-flex cables, the micro-SD card, any M.2 expansion card, and the fan header are the parts most likely to require replacement after extended use.

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