TL;DR: If you need raw CPU/GPU performance, faster I/O, or plan to run a desktop OS or AI workloads, buy the Raspberry Pi 5. If you have a tight budget, rely on USB-powered peripherals, or your project is already working fine on a Pi 4, stick with the Pi 4—its maturity and lower power draw still make it a solid choice.
The Silicon Leap: Broadcom BCM2712 vs BCM2711
The Raspberry Pi 5’s headline upgrade is its Broadcom BCM2712 SoC, built on a 16nm process, compared to the Pi 4’s 28nm BCM2711. This process shrink delivers a 2-3x performance boost in multi-threaded workloads, with Geekbench 6 scores hovering around 1,600 (vs ~600 on the Pi 4). The CPU is a quad-core Arm Cortex-A76 running at 2.4GHz, versus the older Cortex-A72 at 1.8GHz. That architectural shift matters: A76 has out-of-order execution, which dramatically improves per-clock IPC. For real-world use, this means snappier web browsing, faster code compilation, and smoother 4K video playback with H.265 hardware decoding that finally feels effortless.
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Memory, Storage, and PCIe: The I/O Revolution
The Pi 5 offers LPDDR4X SDRAM at 4267MT/s (up to 16GB), double the bandwidth of the Pi 4’s LPDDR4 at 3200MT/s. More importantly, the Pi 5 introduces a dedicated PCIe 2.0 x1 interface (via a FPC connector) that supports NVMe SSDs. This is a game-changer: booting from an NVMe drive yields sequential read speeds of ~400MB/s, vs ~100MB/s from a microSD card. The Pi 4 lacks this entirely, forcing users to rely on USB 3.0 adapters that cap at ~300MB/s with added latency. Additionally, the Pi 5’s dual 4K HDMI outputs now run at 60Hz (Pi 4 was capped at 30Hz for dual displays), and the USB 3.0 ports have been doubled to two, while the USB 2.0 ports are now both powered with 1.2A output each—essential for external drives.
Power, Thermals, and Real-World Impact
The Pi 5 requires a 5V/5A (25W) USB-C power supply, while the Pi 4 runs happily on 5V/3A (15W). This is a direct consequence of the new SoC’s peak power draw (~12W under full load vs ~7W on Pi 4). However, the Pi 5’s active cooler (included with the 4GB+ variants) is nearly silent, and the board’s new RP1 I/O controller offloads USB and Ethernet tasks, freeing the CPU. Industry impact: the Pi 5 has become the default choice for edge AI inference (via Hailo-8L AI Kit) and lightweight Kubernetes clusters, while the Pi 4 remains a staple in industrial automation due to its proven reliability and lower thermal envelope for fanless enclosures. The Pi 5’s PCIe also enables custom SATA HATs, pushing it into NAS territory—something the Pi 4 could only mimic poorly.
Software and Longevity Considerations
Raspberry Pi OS (Bookworm, based on Debian 12) is fully optimized for the Pi 5, with Vulkan 1.2 GPU drivers (VideoCore VII, which is 2x faster than the Pi 4’s VideoCore VI). However, the Pi 4 still receives regular updates and will do so until at least 2028. The Pi 5’s boot time is ~10 seconds faster due to the NVMe support, and it supports USB 3.0 boot out of the box (the Pi 4 needed a EEPROM update for this). For hobbyists, the Pi 5’
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