Raspberry Pi 5: 2GB, 4GB, 8GB or 16GB? Which RAM to buy
Which Raspberry Pi 5 memory size should you buy? What each RAM option is good for, the cooling and power supply you also need, and a quick decision tree.
The Raspberry Pi 5 is built around the Broadcom BCM2712: four Cortex-A76 cores at 2.4 GHz, a VideoCore VII GPU and the RP1 I/O controller. It is also the first full-size Raspberry Pi with a PCIe 2.0 ×1 link, which opens the door to NVMe SSDs through an add-on board. Specs from the official Raspberry Pi 5 page.
This guide covers the memory options in the range (availability varies by country), what you must budget for cooling and power, and how to choose.
1. Raspberry Pi 5 RAM options
| RAM | Typical use |
|---|---|
| 1GB | Ultra-low-cost edge jobs: simple scripts, a light gateway. Little headroom for a web browser or IDE. |
| 2GB | Minimal servers, displays, bots. Not ideal as a family desktop with many browser tabs. |
| 4GB | The all-round choice: Raspberry Pi OS desktop, coding, modest web stacks, Home Assistant. |
| 8GB | Several containers, databases, serious compiling, a desktop with many background services. |
| 16GB | Rarely needed on a single-board computer: small local AI models, big builds, caches. Only buy it if you know why. |
Memory is LPDDR4X-4267 on the Pi 5 (LPDDR4-3200 on the Pi 4).
2. What really changes compared with the Pi 4
- CPU: clearly faster in most compiling and encoding benchmarks.
- PCIe: faster storage or add-on cards, with compatible hardware and enough power.
- Heat: the Pi 5 warms up quickly; the official Active Cooler (or a serious equivalent) is close to essential for long workloads.
- Power: Raspberry Pi recommends its 27W USB-C supply (5V, 5A) to unlock full USB current. Weak phone chargers cause warnings or throttling. The official supply is sold with UK, US and EU plugs.
3. Which one should you choose?
- Tight budget, no desktop: 2GB (or 1GB if you have measured your services’ RAM use).
- First Pi for family, school or making: 4GB.
- Home lab with Docker or several stacks: 8GB.
- Big compiles, memory-hungry models, no compromise: 16GB, after checking that storage and cooling keep up.
Prices move often and differ between the UK and the US: check current price with an official reseller. US: Raspberry Pi 5 4GB on Amazon.com or Raspberry Pi 5 8GB on Amazon.com (affiliate links). The gap between 4GB and 16GB can be large.
4. Accessories you shouldn’t forget
- Active cooling (official Active Cooler or the official case with fan).
- Power supply: official 27W USB-C or a documented equivalent.
- Fast microSD card, or an NVMe drive if you add a PCIe board.
- Micro-HDMI cables for one or two screens.
5. Where to buy
The Pi 5 is sold through Raspberry Pi’s approved resellers in each country. In the US, SparkFun is one of them: Raspberry Pi 5 at SparkFun (affiliate link).
Flash Raspberry Pi OS with Raspberry Pi Imager, exactly as on earlier models.
Key takeaway: choose the Pi 5 on RAM first (4GB or 8GB for most people), then on a good power supply and cooling.
See also: Raspberry Pi 3 vs 4 vs 5.