The Orange Pi Zero 3W keeps the outline of a Raspberry Pi Zero, 65 x 32 mm (2.6 x 1.3 inches), and fills it with an octa-core Allwinner A733 and as much as 16 GB of LPDDR5. The headline is the silicon: two Arm Cortex-A76 cores paired with six Cortex-A55 cores, a Xuantie E902 RISC-V coprocessor, and an NPU rated up to 3 TOPS, all on a board the size of a stick of gum. Pricing starts at $25 (€23). My review unit, supplied by OrangePi, runs 6 GB of RAM, and after a week of testing it I can say it behaves far more like a lightweight desktop than its footprint suggests.
Specifications
- SoC: Allwinner A733 (kernel platform sun60iw2), 12 nm
- CPU: 8 cores, 2x Cortex-A76 (measured up to 2002 MHz) and 6x Cortex-A55 (measured up to 1794 MHz), aarch64
- Coprocessor: Xuantie E902 RISC-V core
- NPU: rated up to 3 TOPS (INT8)
- GPU: Imagination PowerVR (pvrsrvkm) with sunxi-drm
- Memory: LPDDR5 at 4800 MT/s, configurations from 1 GB to 16 GB; as tested 6 GB (5.7 GiB usable)
- Storage interfaces: microSD slot (up to 128 GB), plus onboard eMMC and UFS options
- Wireless: Wi-Fi 6 and Bluetooth 5.4 (AIC8800, SDIO-attached)
- USB and video: USB-C host with USB 3.1 Gen 2 (10 Gbps) and DisplayPort Alt Mode video output
- Dimensions: 65 x 32 mm (2.6 x 1.3 inches)
- OS as tested: Orange Pi 1.0.0 (Debian 11 Bullseye), kernel 6.6.98-sun60iw2
- Price: starting at $25 (€23)
Design and Build
First impressions are good. The board arrived well packaged, a utilitarian plastic clamshell holding the board itself, with a separate paper box for the heatsink and fan and a bag for the power adapter. Nothing about the presentation is flashy, and nothing needs to be.
The board itself feels well made, and the bundled heatsink looks like a milled block of anodized aluminium rather than a stamped afterthought. For a device this small, the fit and finish are reassuring, and the included heatsink and fan form a compact cooling stack that adds very little to the overall volume.
The density is the story here. Getting eight cores, LPDDR5, Wi-Fi 6 and a 10 Gbps USB controller onto 65 x 32 mm (2.6 x 1.3 inches) leaves no spare real estate. The A733 also carries a PCIe 3.0 controller, and probing the board confirms an on-chip PCIe bridge, but nothing is broken out to an M.2 or NVMe slot in this footprint. Storage means the microSD slot plus the unpopulated eMMC and UFS pads. I would have welcomed a PCIe storage option, but there is genuinely no room for it on a board this size, and that is a fair trade for the form factor. Orange Pi also makes the Orange Pi 4 Pro which does provide NVMe storage capabilities.
Performance
The eight cores are not symmetric, and that is the key to reading the numbers. Multi-threaded 7-Zip across three consecutive runs returned 12308, 12359 and 12321 MIPS, with single-threaded throughput on a Cortex-A76 core at 2673 MIPS. For context, a Raspberry Pi Zero 2 W tops out around 3034 MIPS at its stock 1 GHz in the same test, so the Zero 3W delivers roughly four times the multi-core throughput in an identical footprint. That multi-core result reaches into Raspberry Pi 5 territory, which is remarkable for something this size.
The core layout explains the spread. The two Cortex-A76 cores form the performance cluster and the six Cortex-A55 cores handle everything else, aarch64 throughout, a single memory domain, and no simultaneous multithreading, so eight physical cores mean eight real threads rather than four cores pretending to be eight. Memory bandwidth tracks the same split: libc memcpy measured 6288.3 MB/s on a Cortex-A76 core versus 3664.6 MB/s on a Cortex-A55, while memset landed at 8414.5 MB/s and 8397.1 MB/s respectively. DRAM random-read latency settled between 167.6 ns and 173.5 ns at a 64 MB stride.
With Arm AES, PMULL and SHA extensions present, OpenSSL flies. AES-256-CBC at an 8 KB block hit about 1.14 GB/s on a Cortex-A76 core and 0.83 GB/s on a Cortex-A55, and AES-128-CBC reached roughly 1.59 GB/s on the A76. That is enough headroom to keep an encrypted volume or a VPN endpoint from becoming the bottleneck.
Accelerated 3D is the one area still coming together. The PowerVR kernel driver (pvrsrvkm) and sunxi-drm both load, but glmark2 could not obtain a usable GL or EGL context on the tested image, and Vulkan reports no compatible driver. Orange Pi's manual notes that the Debian Bullseye image is the only official build with GPU and video encode support, so this reads as a driver initialization gap on the current image rather than absent hardware, and it is an active work in progress. The NPU, rated up to 3 TOPS, is present and clocked (measured at 1008 MHz) and waiting on the same software maturation.
Connectivity and I/O
The standout is USB. One of the USB-C ports exposes a full USB 3.1 Gen 2 host path at 10 Gbps, which is rare in this class and opens the door to genuinely fast external storage or capture devices. The same USB-C pathway carries DisplayPort Alt Mode video: I ran the desktop at 1920x1200 at 60 Hz on a 16-inch (40.6 cm) portable display straight off the port, and it also drove USB-C hubs and a USB-C Ethernet adapter without complaint.
Wi-Fi 6 over the AIC8800 (aicwf_sdio) connected without trouble and ran at the speeds I would expect given my network and radio environment, and Bluetooth 5.4 rides the same module. There is no onboard Ethernet, which is normal for this class, and a USB-C gigabit adapter worked out of the box. Audio is handled by the Allwinner I2S blocks.
Software and Linux Support
Orange Pi offers a reasonable spread of images: Debian Bullseye and Bookworm, Ubuntu Jammy, Android, and an Arch-based Orange Pi OS (not available at the time of writing), in both server and desktop flavors. I chose the Bullseye desktop build because the manual lists it as the only image with working GPU and video encode and transcode support. Everything ships on a vendor 6.6.98 kernel fork.
Mainline Linux for the A733 is early but moving. Allwinner released the A733 datasheet, user manual and Linux SDK without an NDA in mid-2025, though that SDK targets the 5.15 LTS kernel and is not itself headed upstream. The real upstreaming is community-driven through linux-sunxi, where clock, RTC and pinctrl support for the chip is being written by contributors including Andre Przywara and Junhui Liu. The closely related A523, A527 and T527 family already has basic mainline support merged as of kernel 6.15, and the A733 sits a step behind it on the same trajectory. For now the board runs happily on Orange Pi's BSP kernel, with mainline support in progress.
The documentation deserves a mention of its own. The downloadable Orange Pi manual is thorough, with step-by-step instructions for installing all manner of software, and it bailed me out more than once.
Thermals, Power and Noise
I tested the board in a very well-ventilated space with good airflow, with the bundled heatsink and fan installed throughout benchmarking. Under those conditions it stayed cool and never throttled. Idle sat at 33.8°C (92.8°F), the full run averaged 38.4°C (101.1°F), and the hottest the SoC reached under a sustained all-core load was 53.0°C (127.4°F).
Crucially, the clocks held. The Cortex-A76 cores stayed at 2002 MHz and the Cortex-A55 cores at 1794 MHz for the duration, with sbc-bench confirming no throttling and no swapping (the 2.9 GiB of zram went untouched throughout). For a passively cooled chassis you would expect to see clocks sag under a long all-core run, and here they simply did not.
The fan earns its place. Running the same benchmarks without it pushed temperatures up quickly, so the bundled heatsink and fan is a must-have for anything demanding, even if light desktop duty is comfortable on the heatsink alone. The fan itself is small and audible under load but not intrusive. I did not have an inline power meter on the bench, so I am leaving wall-draw figures out rather than estimate them.
Everyday Use
Living with the Zero 3W is the best part. The XFCE desktop is lean, with little bloat, and it ships with Chromium and Firefox ESR. It feels snappy: no noticeable lag, web browsing is quick, PDFs render fast, and it generally plays like a desktop computer, all while running off a microSD card. Setup was painless too. I flashed the Bullseye desktop image with Raspberry Pi Imager, dropped the card in, and the board booted straight away.
There are a couple of quirks worth flagging so they do not catch you out. SSH did not connect at first, though that may well have been residue from my own earlier testing; running the documented reset_ssh.sh script sorted it immediately. And the flashing red LED on boot looks alarming until you read the manual and learn it is intended behavior, not a fault.
Verdict
The Orange Pi Zero 3W packs genuinely surprising compute into a Raspberry Pi Zero footprint: eight real cores, up to 16 GB of LPDDR5, a 10 Gbps USB port, and roughly four times the multi-core throughput of a Pi Zero 2 W, all while holding full clocks under sustained load with the bundled cooler. The caveats are the ones that come with fresh silicon. Accelerated 3D is not yet working on the current image, mainline kernel support is in progress, and there is no onboard Ethernet. None of those are dead ends, and the board is fully usable today on Orange Pi's BSP image.
Who should buy it? Anyone who wants meaningfully more compute or memory than a Pi Zero class board can offer, in the same tiny footprint, for a home server, a compact desktop, a self-hosted app box, or an edge AI experiment. At a starting price of $25 (€23) and scaling to about $99.90 (€92) for the 12 GB model, with a 16 GB version listed but not yet on sale, it is strong value for the silicon on offer. With the Raspberry Pi Zero 2 W still hard to find near its launch price in many regions, the case for the Zero 3W only gets easier. It is available through the official Orange Pi store.
