Integrated into a keyboard unit, the Raspberry Pi 400 makes for a neat desktop PC. Just plug it into a monitor and away you go. Keyboard case aside, however, it’s essentially a modified Raspberry Pi 4, using the same Broadcom BCM2711 quad-core Cortex-A72 processor. And, just like the Pi 4, you can overclock it if you feel the need for extra speed. Here we’ll show you how to do it.