Radxa
Radxa X4
- Processor
- Intel N100
- RAM
- 16 GB
- Network
- 1 × 2.5 GbE
Great fit for: Home Assistant · Media server
An Intel N100 PC in Raspberry Pi size, with a Pi-style GPIO header driven by an RP2040.
—Recommended
Raspberry Pi · Raspberry Pi · 2021
Raspberry Pi Zero 2 W
Photo: Anil Öztas · CC BY 4.0
Good budget option
A tiny, cheap Wi-Fi board with 512 MB: for sensors, cameras and single-purpose gadgets.
- Processor
- Raspberry Pi RP3A0 (BCM2710A1)
- RAM
- 0.5 GB
- Network
- None
- Drive slots
- 0
Great fit for: Electronics / GPIO
from $15 (typical price)
Researched from manufacturer data and public reviews; not tested by us.· Last reviewed Oct 28, 2026
What it is good for
Derived from the specsOur rules applied to its specs. The reasons come from the data in the specification table. How the verdicts are decided
- Home AssistantNot suitable
- Home Assistant OS does not install on it; only in a virtual machine or as a container
- Media serverLimited
- Hardware encoder for H.264 only
- No HEVC 10-bit decoding: HDR files are hard work
- Homelab / ProxmoxLimited
- Arm processor: Docker works, Proxmox VE does not
- Router / firewallNot suitable
- No wired network port
- NASLimited
- No internal drive slot: USB drives only
- DesktopNot suitable
- Linux desktop on Arm: fine for browsing, coding and learning, slow with heavy sites
- Electronics / GPIOGreat fit
- 40-pin GPIO header
- The most tutorials, HATs and libraries of any board
Configurations and where to buy
Prices are editorial references (launch price and a typical street price on the date shown), not live prices. In 2026 the memory shortage has pushed many prices well above launch.
- Raspberry Pi Zero 2 W0.5 GB · none (microSD)Launch price: $15 · Typical price: ~$15 (checked Oct 28, 2026)
Official list price; the GPIO header is unsoldered (the WH version has it).
- Check price Amazon.com (opens in a new tab)Amazon.comCheck availability
Other regions (3)
- Check price Amazon.co.uk (opens in a new tab)Amazon.co.ukUnited Kingdom · Check availability · Search results
- Check price Amazon.es (opens in a new tab)Amazon.esSpain · Check availability · Search results
- Check price Amazon.de (opens in a new tab)Amazon.deGermany · Check availability · Search results
Prices are shown only if updated in the last 24 hours and may change; the retailer’s price at checkout applies. We may earn a commission from these links at no cost to you. Affiliate disclosure
Overview
Editorial opinionBest for: Sensors, a camera, a retro handheld or a Pi-hole on Wi-Fi.
Editorial opinionWould we buy it today?
Yes for gadgets and electronics; not as a home server.
Pros and cons
Editorial opinionPros
- Tiny and very cheap
- Spared from the 2026 price rises
- Same GPIO as bigger Pis
Cons
- 512 MB of RAM
- No Ethernet
- Too small for Home Assistant OS
Specifications
Factual dataGeneral
- Manufacturer
- Raspberry Pi
- Type
- Single-board computer
- Form factor
- Zero-size board
- Released
- 2021
- Availability
- On sale
Processor and graphics
- Processor
- Raspberry Pi RP3A0 (BCM2710A1)Arm (64-bit) · Cortex-A53
- Cores / threads
- 4 / 44× Cortex-A53
- Max clock
- 1 GHz
- Graphics
- VideoCore IV
- Hardware video decode
- H.264
- Hardware video encode
- H.264
Memory and storage
- RAM options
- 0.5 GB
- RAM type
- LPDDR2
- RAM upgrades
- Soldered, cannot be upgraded
- M.2 slots
- 0
- microSD slot
- Yes
Network
- Ethernet
- NoneNo Ethernet (USB adapter possible)
- Wi-Fi
- Wi-Fi 4 (2.4 GHz)
- Bluetooth
- 4.2
Displays, USB and expansion
- Displays at once
- 1
- Video outputs
- 1× mini-HDMI
- USB
- 1× micro-USB OTG
- USB4 / Thunderbolt
- No
- GPIO header
- Yes
Power, cooling and size
- Power input
- micro-USB 5 V / 2.5 A
- Power supply
- External adapter
- Adapter / max power
- 12 W
- Cooling
- Fanless (silent)
- Size (W × D × H)
- 65 × 30 × 5 mm
- Volume
- 0.01 L
Raspberry Pi RP3A0 (BCM2710A1): A Pi 3-class chip with 512 MB stacked on top: for sensors, cameras and tiny services.
Source: Manufacturer specifications
Software support
Editorial opinionHow well each system installs and runs on it today (editorial assessment).
- Windows 11Not supported
- Linux (Debian, Ubuntu or vendor image)Excellent
- Proxmox VENot supported
- Home Assistant OSNot supported
- OPNsense / pfSense / OpenWrtNot supported
Measured
Factual dataMeasured values with their source. We never invent figures.
No measured values yet.
Alternatives
Raspberry Pi
Raspberry Pi 5
- Processor
- Broadcom BCM2712
- RAM
- 16 GB
- Network
- 1 × 1 GbE
Great fit for: Electronics / GPIO
The reference board: two to three times a Pi 4, PCIe for an NVMe SSD and the best software of any SBC.
from $78 (typical price)Highly recommended
Other boards
ZimaSpace ZimaBoard 2
- Processor
- Intel N150
- RAM
- 16 GB
- Network
- 2 × 2.5 GbE
Great fit for: Home Assistant · Media server · Router / firewall
A silent, fanless N150 board in an aluminium case with two Intel 2.5 GbE ports, two SATA ports and a PCIe slot.
from $279 (typical price)Recommended