Raspberry Pi 4 Model B

The Raspberry Pi line of single-board computers has been enormously popular, thanks to its super affordable price, compact size and maker-friendly design. The latest version, the Raspberry Pi 4 Model B ($55 as tested), is the most powerful yet, getting a major increase in processing power, enhanced video output and peripheral connectivity, while maintaining the same low price and tiny size offered on past models. The new Pi 4 gets exciting features, like USB 3.0 ports, power over USB Type-C and Ethernet, and video output that will handle two 4K monitors at a time. Plus, you still get all the unique connectivity and expansion of the Pi’s GPIO pins and compatibility with past add-ons and accessories. But all those changes do come with some new inconveniences. Because of the tweaks made to the Pi 4, the software used on older models is not directly compatible, and the updated port selection means that older case designs won’t work with the new model.