- Integrates dual Cortex-A76 and hexa Cortex-A55 cores with a 3 TOPS NPU in a compact form factor
- Provides high-speed PCIe Gen3 x1 expansion via an onboard FPC connector
- Supports dual display output via Micro HDMI 2.0b and USB-C DisplayPort Alt Mode
- Features modern wireless networking with Wi-Fi 6 and Bluetooth 5.4
- Lacks onboard RJ45 Ethernet and full-size USB Type-A ports, requiring external adapters
- High-speed UFS 3.0 storage requires surface-mount soldering to unpopulated pads rather than a modular socket
Overview
Routing an Allwinner A733 octa-core cluster, a dedicated 3 TOPS neural processing unit, and a PCIe Gen3 x1 bus across a 2.56 x 1.18 in (65 x 30 mm) Raspberry Pi Zero footprint represents an aggressive exercise in high-density board routing. The compute complex pairs two high-performance Arm Cortex-A76 cores clocked up to 2.00 GHz with six power-efficient Cortex-A55 cores running up to 1.79 GHz, complemented by a single-core RISC-V E902 real-time coprocessor. Graphics and edge visual pipelines are driven by an Imagination Technologies BXM-4-64 MC1 GPU alongside hardware-accelerated video decoding up to 8Kp24 and encoding up to 4Kp30. This silicon foundation delivers exceptional parallel processing and low-latency computer vision throughput for an ultra-compact embedded development platform.
Physical implementation centers around a multi-layer PCB housing high-speed interconnects, including a 4-lane MIPI CSI camera connector, a color-coded 40-pin GPIO header, and modern wireless networking managed by a Quectel FCU760K module supporting Wi-Fi 6 and Bluetooth 5.4 with an external IPEX antenna port. The board operates from a 5V/1A power input rail supplied via USB-C or directly through the GPIO header. Thermal dissipation relies entirely on passive conduction across the internal copper planes; under sustained computational loads across the Cortex-A76 cores, heat builds up rapidly within this surface area, making an aftermarket passive heatsink or directed airflow essential to avoid clock throttling in enclosed spaces.
Practical integration presents deliberate engineering compromises tailored to edge prototyping. Video output is versatile with simultaneous Micro HDMI 2.0b and USB-C DisplayPort Alt Mode capabilities, but the complete omission of full-size USB Type-A ports and native RJ45 Ethernet necessitates external dongles, carrier breakout boards, or wireless networks for full peripheral access. Removable storage relies on a standard MicroSD slot, while onboard high-speed 2-lane UFS 3.0 storage requires precision surface-mount soldering onto unpopulated PCB pads rather than utilizing a swappable socket. For developers requiring hardware-accelerated inference and PCIe expansion in minimal spatial envelopes, the platform offers significant architectural density tempered by clear physical adapter requirements.
Technical Specifications
| Brand | Radxa |
| Model | Cubie A7Z 2GB |
| SoC | Allwinner A733 (A733MX-HN3) |
| CPU Architecture | Dual-core Arm Cortex-A76 @ up to 2.00 GHz, Hexa-core Arm Cortex-A55 @ up to 1.79 GHz, Single-core RISC-V E902 real-time core |
| GPU | Imagination Technologies BXM-4-64 MC1 (OpenGL ES 3.2, Vulkan 1.3, OpenCL 3.0) |
| NPU | 3 TOPS AI accelerator |
| VPU | 8Kp24 H.265/VP9/AVS2 decoding, 4Kp30 H.265/H.264 encoding |
| System Memory | 2GB LPDDR4/4x |
| Storage Support | MicroSD slot, unpopulated footprint for 2-lane UFS 3.0 (64GB to 512GB) |
| Display Interfaces | 1x Micro HDMI 2.0b (up to 4Kp60), 1x USB-C with DisplayPort Alt Mode |
| Camera Interface | 4-lane MIPI CSI connector |
| Wireless Connectivity | Dual-band Wi-Fi 6, Bluetooth 5.4 (Quectel FCU760K module, IPEX antenna connector) |
| USB Ports | 1x USB 2.0 OTG Type-C (power/data), 1x USB 3.1 OTG Type-C (with DisplayPort Alt Mode) |
| Expansion Interfaces | 40-pin color-coded GPIO header, PCIe Gen3 x1 FPC connector |
| Form Factor | Raspberry Pi Zero standard footprint, 2.56 x 1.18 in (65 x 30 mm) |
| Power Delivery | 5V/1A via USB-C or 5V DC via 40-pin GPIO header |
Primary Sources & Audited Citations
Recommended Alternatives in Single Board Computers (SBCs)
At a Glance
How reliable is the Radxa Cubie A7Z 2GB Review: PCIe Expansion in Zero Footprint according to Mizex audits?
A compelling choice for compact edge machine learning and embedded robotics projects needing PCIe connectivity, provided your workflow can accommodate USB-C dongles and passive heatsinking.
What are the known quirks or drawbacks of the Radxa Cubie A7Z 2GB Review: PCIe Expansion in Zero Footprint?
Our reliability audit identified the following documented caveats:
- Lacks onboard RJ45 Ethernet and full-size USB Type-A ports, requiring external adapters
- High-speed UFS 3.0 storage requires surface-mount soldering to unpopulated pads rather than a modular socket
What are the key engineering highlights of the Radxa Cubie A7Z 2GB Review: PCIe Expansion in Zero Footprint?
The top strengths recorded in our evaluation include:
- Integrates dual Cortex-A76 and hexa Cortex-A55 cores with a 3 TOPS NPU in a compact form factor
- Provides high-speed PCIe Gen3 x1 expansion via an onboard FPC connector
- Supports dual display output via Micro HDMI 2.0b and USB-C DisplayPort Alt Mode
- Features modern wireless networking with Wi-Fi 6 and Bluetooth 5.4