Raspberry Pi 4 just got a lot cooler! The last four months of firmware updates have taken over half a watt out of idle power and nearly a watt out of fully loaded power. For The MagPi magazine, Gareth Halfacree gets testing. Raspberry Pi 4 Model B Raspberry Pi 4 launched with a wealth of new features to tempt users into upgrading: a more powerful CPU and GPU, more memory, Gigabit Ethernet, and USB