Raspberry Pi & SBC upgrade guides
Single-board computers — fixed RAM; storage via microSD, USB, or NVMe HAT.
Raspberry Pi 5
Latest Pi — 4 or 8 GB on-board RAM; NVMe via PCIe HAT.
Raspberry Pi 4 Model B
Classic Pi — 1–8 GB RAM variants fixed; microSD or USB boot.
Raspberry Pi NVMe storage guide
How to add fast NVMe storage to Pi 5 (and compatible Pi 4 setups).
Raspberry Pi 3 Model B+
Pi 3 era — 1 GB RAM fixed; microSD boot.
Raspberry Pi 3 Model B
Earlier Pi 3 — 1 GB RAM fixed.
Raspberry Pi 2 Model B
Legacy Pi 2 — 1 GB RAM fixed; microSD only.
Raspberry Pi 1 Model B+
Original Pi B+ — 512 MB RAM fixed.
Raspberry Pi Zero 2 W
Compact Pi — 512 MB RAM fixed; microSD.