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Bridging the PC world to the Raspberry Pi maker community

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Carrier board for: Raspberry Pi 4 Compute Module*
Form factor: Mini-ITX
Dimensions: 170x170mm



The design is ready to go and is built up from the Raspberry Pi CMIO 4 board schematic and extended to include more PC-centric components and engineered for maximum compatibility with Mini-ITX, Micro-ATX and ATX cases and PC peripherals.

* Raspberry Pi 4 Compute Module not included with Over:Board as you may already have one and they are readily available from online retailers

Over:Board: Press Kit
Over:Board: Pro Gallery


In addition to the standard Raspberry Pi interfaces found on the various standard models and the Compute Module I/O board, the Over:Board offers a full-size PCI-Express slot (but still just the 1x single-lane PCI-E v2.0 bus), a 24-pin ATX power header, Real-Time Clock with backup battery, RS232 (DB9) COM port, USB 2.0 4-port hub with two physical ports, USB Audio IC with Line-out and Mic-in, and a USB SATA controller for HDD/SSD storage. I've kept the PCI-Express lane clear to the slot for full performance expansion cards and offer the additional functionality using the USB 2.0 bus which gives minimal functionality without compromising expandability.

Over:Board: Welcome


The Raspberry Pi 4 Compute Module

  • Broadcom BCM2711 quad-core Cortex-A72 (ARM v8) 64-bit SoC @ 1.5GHz

  • H.265 (HEVC) (up to 4Kp60 decode), H.264 (up to 1080p60 decode, 1080p30 encode) 

  • OpenGL ES 3.0 graphics

  • Options for 1GB, 2GB, 4GB or 8GB LPDDR4-3200 SDRAM (depending on variant)

  • Options for 0GB ("Lite"), 8GB, 16GB or 32GB eMMC Flash memory (depending on variant)

  • Option for fully certified radio module: 2.4 GHz, 5.0 GHz IEEE 802.11 b/g/n/ac wireless; Bluetooth 5.0, BLE;

Over:Board: About Us
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