8GB Raspberry Pi 4

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• 1.5GHz quad-core Broadcom BCM2711 CPU
• 1GB, 2GB or 4GB RAM
• 2x mini HDMI ports
• 40-pin GPIO connector
• CSI camera and DSI display connectors
• 802.11ac Wi-Fi
• Gigabit Ethernet
• 2x USB 2.0 and 2x USB 3.0 ports

With the launch of the Raspberry Pi 3 Model B+, the tiny hobbyist computer came within touching distance of being a fully-fledged desktop computer. With the Raspberry Pi 4 Model B that dream is realised.

With a more powerful processor, a choice of RAM, hardware H.265 4K video decoding, dual HDMI outputs and proper Gigabit Ethernet networking, the Pi 4 is a massive step up performance wise from what’s come before. It gets a touch toasty, and the new board layout means the new version isn’t compatible with the old, but these are minor details against what’s otherwise a brilliant computer.

Raspberry Pi 4 – What you need to know

• Performance: A faster processor makes the Pi 4 slicker and smoother to use and lets you develop more complicated projects, but the CPU can get quite warm.
• Graphics performance: There’s a faster GPU, but the main difference is the support for dual monitors. Look out for hardware 4K video decoding soon, too.
• Features: Faster SD card, USB 3.0 ports, full-speed Gigabit Ethernet and Bluetooth 5.0 are all great to see, and you still get the same GPIO, camera and display interfaces that make old projects easy to transfer from an old Pi to this one.

The Raspberry Pi 4 has a much more powerful processor and the option for more RAM, but it gets toasty

One of the key differences with the Raspberry Pi 4 Model B is that it has a more powerful processor; the quad-core Broadcom BCM2711 SoC. Running at 1.5GHz, this chip is only 100MHz faster than the 1.4GHz quad-core Broadcom BCM2837 used in the Pi 3 Model B+, but the speed difference between the two is far higher. This is because the Pi 4 uses ARM v8 Cortex-A72 cores, rather than the older Cortex-A53 used by the Pi 3 Model B+.

As well as boosting the CPU, the Pi 4 is also the first in the line to offer a variety of different memory sizes, with 1GB (£34), 2GB (£44) and 4GB (£54) options available. And, the Pi 4 uses more modern DDR4 RAM, too. Installing more memory makes the Pi 4 better suited for more complicated projects or for using it as a desktop computer.

Running some benchmarks, you can start to see the difference between the two systems. Using Sysbench to calculate all of the prime numbers up to 10,000, the Raspberry Pi 3 Model B+ completed the test in 35.94s; the Pi 4 in 23.23s.

Moving to the Speedometer 2.0 browser benchmark, the Pi 3 Model B+ completed the test with a score of 8.813, the Pi 4 scored 15.15.

That’s all good news, but it’s worth mentioning that the Pi 4 gets very hot, and if you push it too far, the CPU throttles down and a thermometer icon flashes onscreen to tell you that the computer is hot. Sat idle overnight, I measured the external temperature of the Pi 4 at 61C; after running benchmarks, the external chip was 71.3C.

That makes the Pi 4 rather warm and you can even feel the heat through the case, so you should be careful handling it at these temperatures. The heat has a knock-on effect on performance. Without any cooling on the Pi 4, the Sysbench benchmark took 28.78 seconds to finish.