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Graperain’s A733 development board is a gold-finger system-on-module paired with a carrier board. It offers configurable LPDDR5 memory and an M.2 slot described for 2280-format SSDs. The processor is Allwinner’s A733—not a Rockchip chip, despite a conflicting label on Graperain’s English product page. The slot’s size alone does not confirm that every M.2 NVMe drive will work, so check the exact board revision and configuration before ordering.
What the A733 development board is
Graperain presents the product as an A733 gold-finger module and carrier board, rather than as a conventional single-board computer with a fixed set of connectors. The distinction matters: the module contains the processor and memory configuration, while the carrier board provides the connections and expansion options described by the vendor.
Graperain’s Chinese product page and Allwinner’s own material identify the processor as the Allwinner A733. Graperain’s English page contains the conflicting phrase “Rockchip A733.” That label does not match the chipmaker’s product material; treat the platform as Allwinner A733.
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Random freezes, missing sound and display glitches usually trace back to one bad driver. Find and replace yours safely.Free scan · under a minuteAllwinner describes the A733 as an octa-core Arm processor with two Cortex-A76 cores and six Cortex-A55 cores. The vendor also lists an Imagination PowerVR BXM-4-64 MC1 GPU, a 3-TOPS NPU and a RISC-V XuanTie E902 MCU. These are platform specifications from Allwinner, not independent benchmarks or measurements of this particular board. Allwinner A733 product material
#1 Best Overall
- Performance: Embedded single-board computer equipped with a quad-core 64-bit processor and supporting the Linux operating system; suitable for edge computing, the Internet of Things (IoT), and other control applications
- Specifications: The development board offers multiple configuration options, featuring LPDDR4 memory and eMMC flash storage, allowing users to select the configuration that best suits their needs
- Design: The industrial AI module features a compact design with low power consumption and supports AI acceleration, making it suitable for deep learning and machine vision
- Reliability: The motherboard supports a wide temperature range, ensuring long-term, continuous, stable, and reliable operation in industrial environments
- Applications: Widely used in embedded development, smart gateways, AI vision, and industrial automation
Memory and storage options
LPDDR5 configurations
Allwinner lists LPDDR4, LPDDR4x and LPDDR5 as memory technologies supported by the A733 platform. Graperain’s Chinese board page lists LPDDR5 configurations of 2, 4, 8 or 16 GB. That board-level list is more useful for choosing a configuration than the SoC’s broader memory support: it does not mean that every supported memory type is offered on this board. The page does not establish that every capacity is available in every order or revision. Graperain A733 development board page (Chinese) Allwinner A733 product material
Onboard storage and M.2 expansion
Graperain lists multiple eMMC capacities and describes one M.2 slot for 2280-format SSDs. Allwinner lists UFS and eMMC among A733 platform storage capabilities, but those SoC options do not establish which storage configurations a particular Graperain order includes. The vendor’s board pages support describing the expansion slot as an M.2 2280 SSD slot; they do not establish compatibility with every PCIe or NVMe drive.
Rank #2
- 🍊 [High-Performance Octa-Core CPU]: OrangePi Zero3W is powered by Allwinner A733 with 2×Cortex-A76 + 6×Cortex-A55 cores up to 2.0GHz, delivering strong performance and efficiency for multitasking, edge computing, and embedded applications.
- 🍊 [AI Acceleration with 3 TOPS NPU]: Integrated NPU provides up to 3TOPS (INT8) AI computing power and supports INT8/INT16/FP16/BF16 mixed precision. Compatible with mainstream frameworks for AI inference, vision, and smart applications.
- 🍊 [Ultra-Compact Design]: With a compact size of only 30mm × 65mm, the OrangePi Zero3W is perfect for space-constrained projects, making it easy to integrate into embedded systems, IoT devices, and portable solutions.
- 🍊 [Next-Gen Wireless Connectivity]: Equipped with Wi-Fi 6 and Bluetooth 5.4 (BLE),OrangePi Zero3W offering faster speeds, lower latency, and more stable connections for modern wireless applications.
- 🍊 [Flexible Memory & Storage Options]: OrangePi Zero3W supports LPDDR5 RAM up to 16GB, onboard eMMC up to 32GB, and UFS storage up to 128GB, ensuring high-speed data access and scalable storage for demanding workloads.
Allwinner lists PCIe 3.0 as an A733 interface. A host interface specification is not, by itself, proof of the slot’s exact wiring or behavior on a specific carrier-board revision. Before choosing an M.2 2280 PCIe SSD, ask Graperain to confirm these details for the board and configuration you intend to buy:
- The M.2 connector’s keying and supported drive interface.
- How many PCIe lanes are wired to the slot and at what generation.
- Whether the board can boot from an NVMe drive, or supports it only as additional storage.
- The slot’s power limits and any SSD size or thermal restrictions.
- Whether your chosen operating-system image includes the required storage support.
The pages establish the slot and stated 2280 form factor, not a universal compatibility list. The Graperain English product page also lists documentation downloads; use documentation for the exact revision where available.
Rank #3
- Performance: Embedded single-board computer equipped with a quad-core 64-bit processor and supporting the Linux operating system; suitable for edge computing, the Internet of Things (IoT), and other control applications
- Specifications: The development board offers multiple configuration options, featuring LPDDR4 memory and eMMC flash storage, allowing users to select the configuration that best suits their needs
- Design: The industrial AI module features a compact design with low power consumption and supports AI acceleration, making it suitable for deep learning and machine vision
- Reliability: The motherboard supports a wide temperature range, ensuring long-term, continuous, stable, and reliable operation in industrial environments
- Applications: Widely used in embedded development, smart gateways, AI vision, and industrial automation
What the RISC-V coprocessor does—and what is not established
The XuanTie E902 is a RISC-V microcontroller included in Allwinner’s A733 platform description. It is separate from the Arm Cortex-A76 and Cortex-A55 application processor cores. Allwinner’s material identifies the MCU as part of the platform, but Graperain’s board pages do not establish a specific software workload, development workflow or supported use for it on this carrier board. Do not assume, for example, that it is exposed to a particular SDK or intended for a specific real-time task without board documentation confirming that.
Software, documentation and intended audience
Graperain’s product materials mention Android 15, Buildroot and Debian 11. That list is not a guarantee that current images are available for every board revision or configuration, nor does it establish the level of ongoing support. Confirm which images, source files, instructions and peripheral drivers the vendor currently provides for the exact product you plan to order. Graperain positions the board for customers with development capability and cautions that it is not aimed at beginners. Graperain product page Graperain Chinese product page
Rank #4
- If you're looking for a powerful, and budget-friendly single-board computer,the Orange Pi Zero 3W is an unmissable choice.lt features the high-performanceAllwinner A733 processor, with 2x A76 high-performance cores + 6x A55efficiency cores (up to 2.0 GHz), an eight-core heterogeneous design,integrated 3 TOPS@INT8 computing power, supporting INT8/INT16/FP16/BF16 mixed-precision computing, and compatible with mainstream Alframeworks.
- Allwinner A733, a Leap in Performance - Orange Pi Zero 3W 4G Single Board Computer, Features 3 TOPS of mixed-precision compute (INT8/INT16/FP16/BF16), an octa-core CPU architecture with dual-coreA76 and hexa-core A55, and an independent Xuantie E902real-time core, designed for efficient Al computing andreal-time tasks.
- Open System, Mature Ecosystem -Supports multiple operating systems includingAndroid, Debian, Ubuntu, and OpenHarmony,along with mainstream Al frameworks such asONNX, TensorFlow, PyTorch, and Caffe. Providesa complete toolchain covering the entireworkflow from model import to deployment.
- Multimedia andDisplay Capabilities - One Mini HDMI 2.0 port supporting 4K@60fps.The Type-C interface supports DisplayPort AltMode for connecting to high-definition displays,enabling dual-screen output with independentcontent.
- Wireless Connectivity Stable and Reliable - Wi-Fi 6 + Bluetooth 5.4 (BLE), with support for anexternal antenna, ideal for edge computing and loTapplications.
How to choose a configuration
Start with the workload and software support you need rather than selecting memory capacity or an SSD in isolation.
- Confirm the board format and interfaces. Check what is included in the gold-finger module and carrier-board combination, and verify the carrier’s connectors against your project requirements.
- Choose LPDDR5 capacity. Graperain lists 2, 4, 8 and 16 GB options. Match capacity to the operating system and applications you expect to run, then confirm that your preferred option is available for the revision being quoted.
- Decide whether onboard eMMC is sufficient. Compare the eMMC capacity offered for the configuration with your image and data-storage needs. Do not infer that UFS is fitted just because the A733 platform supports it.
- Validate any M.2 drive before purchase. Confirm keying, PCIe wiring, boot support, power limits and software compatibility with Graperain. A 2280 dimension describes the drive’s form factor, not complete electrical or software compatibility.
- Check the software path. Ask for current images and documentation for the exact revision, and verify that the peripherals and storage path your project needs are supported.
How it differs from the Radxa Cubie A7S
The Radxa Cubie A7S is another product based on the Allwinner A733, but it is a separate board. Radxa documents LPDDR5 options up to 16 GB, PCIe 3.0 x1 NVMe expansion and an E902 MCU up to 200 MHz for the Cubie A7S. Those are Cubie A7S specifications, not specifications for Graperain’s module-and-carrier board. Compare the products by their own dimensions, connector sets, storage implementation and software documentation rather than transferring details from one design to the other. Radxa Cubie A7S documentation
Best Value
- OrangePi Zero 4 is equipped with the powerful Allwinner A733 high-performance processor. It adopts a dual-core Cortex-A76 + six-core Cortex-A55 architecture with a maximum clock speed of 2.0GHz. It integrates the Imagination PowerVR BXM-4-64 GPU and a 3 TOPS NPU, and supports LPDDR5/LPDDR4X/LPDDR4 memory.
- Orange pi zero 4 single board comeputer along with a Gigabit Ethernet port and Wi-Fi 6 + BT 5.4. For video output, it provides Mini HDMI 2.0 (4K@60fps) and a Type-C @DP1.4 interface (with built-in DP output) for connecting to high-definition displays.
- In terms of interfaces, the Orange pi Zero 4 4G offers dual MIPI CSI camera interfaces, a 16Pin FPC (PCIe 3.0 & USB 3.1), a 13Pin expansion header (USB2.0, I2C, UART, PWM, I2S (Digital Audio Input/Output), TWI Digital MIC, IR receiver, GPIO), a 26Pin GPIO（I2C、UART、PWM、SPI、GPIO）, as well as a dedicated RJ45 Ethernet port and Type-C (supporting USB 3.1 + eDP/DP). With dimensions of 50mm × 55mm — smaller than a business card — it still delivers full desktop-class development capabilities.
- Orange Pi Zero 4 is a well-balanced and powerful pocket rocket. While maintaining the Zero series’ compact size and high cost-performance ratio, its configuration of “high-performance CPU + 3 TOPS NPU + 4K display + Gigabit networking + rich interfaces” expands its use cases from basic maker and educational projects to mid-to-high-end applications that demand more in multimedia, networking, and AI computing power.
- It is especially suitable for projects that require high integration, low power consumption, and excellent cost efficiency.
Availability and price
LinuxGizmos reported on September 30, 2026, that pricing was not listed at that time. Current price, stock, shipping regions, revision and configuration availability are not established here; contact Graperain for a current quote and order details. LinuxGizmos coverage, September 30, 2026
Quick Recap
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
