Raspberry Pi 4 Model B / CM4
The Raspberry Pi 4 Model B and Compute Module 4 (CM4) are both members of the Raspberry Pi Foundation's popular single-board computer product line, each optimized for different use cases.
- **Raspberry Pi 4 Model B** is a complete single-board computer for a wide range of users, providing a rich interface options including USB, Ethernet, HDMI, etc., making it a mini desktop computer. It is equipped with a quad-core Cortex-A72 (ARM v8) 64-bit processor, running at a maximum frequency of 1.5GHz, and provides 1GB/2GB/4GB/8GB RAM options. In addition, it also supports dual-band 802.11ac wireless networking and Bluetooth 5.0, making it ideal for application scenarios such as multimedia centers, lightweight game consoles or small servers.
- **Compute Module 4 (CM4)** is a modular solution designed for users who need more flexibility and customization. It uses the same SoC (system on chip) as the Raspberry Pi 4 Model B, but is designed to be a smaller size for easy integration into other devices. CM4 is available in two versions: a version with eMMC storage and a Lite version without storage, which makes it convenient for manufacturers to choose the appropriate configuration according to their needs. CM4 is usually used in conjunction with the Compute Module I/O Board, which provides expansion interfaces including SATA, PCIe, Gigabit Ethernet, etc. to adapt to industrial applications, embedded projects or other occasions that require compact design and high-performance computing capabilities.
In summary, Raspberry Pi 4 Model B is more suitable for users who are looking for an out-of-the-box experience, while CM4 is for developers who want to use the power of Raspberry Pi to develop customized hardware products. The main difference between the two is the applicable scenarios, scalability, and degree of customization.