The Raspberry Pi 3 is a natural and progressive upgrade from the Pi 2. Not only does it open the door to 64-bit computing because of its 64-bit Cortex-A53 based processor, but it also adds Wi-Fi ...

While the Raspberry Pi 4 and Raspberry Pi 3 Model B+ look almost identical (they measure 85 mm x 56 mm, and the board layout is similar), their input/output ports are anything but.

There is also the Raspberry Pi Compute Module 3 (CM3), which packs the same 1.2GHz, quad-core Broadcom BCM2837 processor and 1GB memory used on the Pi 3 onto a slimmer and smaller board.

Otherwise, physically it's identical to the Raspberry Pi 3 Model B and Raspberry Pi 2, featuring four USB 2.0 ports, a 40-pin GPIO header, one full-size HDMI port, display and camera ports, and ...