Raspberry Pi Compute Module 4 CM4 8GB RAM 32GB eMMC - Compact Embedded

In this review the Raspberry Pi Compute Module 4 (CM4) with an included aluminum heatsink and PWM fan is evaluated for developers and integrators who need the compute performance of a Raspberry Pi 4 in a compact, embeddable form. The bottom line: this CM4 variant delivers the same 64-bit Broadcom BCM2711 quad-core processing and multimedia decode capabilities of Pi 4 in a 55 mm by 40 mm module, plus 8GB of LPDDR4 and 32GB of eMMC storage, making it the best choice when you need reliable, low-power computing with integrated storage for custom hardware projects.

Key Features

• 64-bit quad-core processor: The Broadcom BCM2711 quad-core Cortex-A72 at 1.5GHz provides strong single-board performance for edge compute and media tasks.
• 8GB RAM and 32GB eMMC: Generous LPDDR4 memory and onboard eMMC storage support heavier multitasking and remove the need for external microSD storage in embedded deployments.
• Dual-band wireless and Bluetooth 5.0: Built-in 2.4GHz/5GHz WiFi and Bluetooth 5.0 with onboard and external antenna options simplify connectivity for IoT and kiosk use.
• 4K video support: Hardware H.265 decode up to 4Kp60 and H.264 capability enable high-resolution video playback or accelerated video processing in compact systems.
• Compact compute module form factor: The 55 mm by 40 mm CM4 footprint makes integration into custom carrier boards and enclosures straightforward for product designs.
• Aluminum heatsink with PWM fan: Included CNC heat sink and PWM fan help maintain performance under sustained load in confined spaces.

Who It's For

The CM4 with 8GB RAM and 32GB eMMC is aimed at makers, system integrators, and product developers who need the performance of Raspberry Pi 4 in an embeddable package. It suits digital signage, industrial controllers, compact media players, and prototypes that will migrate to custom carrier boards where onboard eMMC and robust wireless are required.

It is less suitable for casual desktop users who prefer a ready-made single-board computer with standard ports and a case, or for those who need many USB 3.0 ports and a full-size HDMI without designing a carrier board. Buyers who want a plug-and-play desktop experience should look at full single-board computer models instead.

Pros & Cons

Pros

• High-performance 1.5GHz 64-bit quad-core CPU offers Pi 4 class compute in a module form factor.
• 8GB LPDDR4 and 32GB eMMC provide fast memory and reliable onboard storage for embedded applications.
• Dual-band WiFi, Bluetooth 5.0, and optional antenna support make wireless integration simple.
• Included aluminum heatsink and PWM fan help sustain performance in tight enclosures.

Cons

• Requires a carrier board or adapter to expose standard ports, so it is not a standalone SBC solution.
• Limited to PCIe Gen 2 x1 for expansion, which constrains some high-bandwidth peripheral options.

Specifications

Form factor	55 mm x 40 mm compute module
Processor	Broadcom BCM2711 quad-core Cortex-A72 @ 1.5GHz
Memory	8GB LPDDR4
Storage	32GB eMMC onboard
Wireless	2.4GHz/5GHz WiFi (802.11b/g/n/ac), Bluetooth 5.0, BLE
Video	H.265 up to 4Kp60 decode, H.264 up to 1080p60 decode
Cooling	Aluminum CNC heat sink with PWM fan included

Our Verdict

The CM4 8GB/32GB module with heatsink and PWM fan is a strong choice for developers and product teams who need Raspberry Pi 4 performance in a compact, embeddable package. It represents good value for projects that require onboard eMMC storage and robust wireless, though it assumes you will design or buy a carrier board to access I/O. For embedded applications where space, power efficiency, and multimedia capability matter, it is a practical and reliable option.

Frequently Asked Questions

Does this module include onboard storage?
Yes. This CM4 variant includes 32GB of onboard eMMC storage, avoiding the need for a microSD card in many embedded setups.

Will it run 4K video?
Yes. The Broadcom BCM2711 SoC supports H.265 hardware decode up to 4Kp60 for high-resolution playback.

Can I use it without a carrier board?
No. The Compute Module 4 requires a carrier board or adapter to provide standard ports and power; the module itself is meant for integration.