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



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.



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;