Raspberry Pi 4 Is Released
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The Raspberry Pi 4 launched in June 2019 with the largest redesign of the board in years. It moved to a quad-core Cortex-A72 CPU, offered up to 4 GB of RAM initially, added true Gigabit Ethernet, USB 3.0, and support for two displays through micro-HDMI ports.
The new processor used a much more capable ARM architecture than the earlier Cortex-A53, so desktop and server workloads improved dramatically. The board also gained a separate USB controller connected through PCI Express, avoiding some of the shared-bandwidth limitations of older models.
Performance came with higher power use and heat, making cooling more important. The Pi 4 moved the platform closer to a low-cost general desktop while preserving GPIO compatibility for electronics projects.