M5Stack AI Pyramid Computing Box 4GB Version (AX8850) is a pyramid‑shaped, high‑performance AI PC designed specifically for local AI inference and edge intelligence deployments. Powered by the Axera AX8850 SoC, it integrates an octa‑core Cortex‑A55 processor and a 24 TOPS @ INT8 NPU, enabling efficient execution of advanced workloads such as AI vision recognition, multimodal interaction, and on‑device large model inference. The system includes 4GB LPDDR4x high‑bandwidth memory and a dedicated hardware video processing engine supporting 8K H.264/H.265 encode/decode and 16‑channel 1080p parallel decoding, making it ideal for AI vision analytics, video processing, and multi‑stream media applications.
Equipped with dual HDMI 2.0 digital multimedia outputs, dual Gigabit Ethernet, USB 3.0, and USB Type‑C interfaces, the AI Pyramid offers extensive flexibility for display output, networking, and peripheral expansion. It functions as a desktop‑grade edge AI computing platform and is well‑suited for field deployment in edge computing and intelligent terminal scenarios. Designed for AI PCs, edge intelligent devices, and smart interactive systems, the AI Pyramid delivers reliable local AI inference for applications such as AI vision gateways, intelligent security, and local smart photo albums (Immich).
Features
- High Performance
- Axera AX8850 SoC
- Octa‑core Cortex‑A55 @ 1.7 GHz CPU
- 24 TOPS @ INT8 NPU for high‑efficiency AI inference
- 4GB (2+2) LPDDR4x 64‑bit 4266 Mbps high‑bandwidth memory
- Rich I/O Interface Suite
- 2× HDMI 2.0 digital audio/video outputs, supporting 4K@60fps
- 4× USB‑A 3.0 ports (including 1 internal onboard port)
- 2× USB Type‑C (USB Host + USB PD 3.0 100W power delivery)
- 2× Gigabit Ethernet ports
- microSD card slot
- 2× HY2.0‑4P expansion interfaces
- Audio Subsystem
- ES8311 audio codec
- ES7210 4‑microphone array input
- AW8317A speaker amplifier
- Hardware Video Engine: 8K@30fps H.264/H.265 encoding/decoding, 16‑channel 1080p parallel decoding
- Secure Boot & Encryption: AES/DES/3DES/SHA‑256 hardware security module
- Native AXCL Support: One‑click deployment for CNN, Transformer, CLIP, Whisper, Llama 3.2, Qwen 3, InternVL3 and other models; supports simultaneous H.264/H.265 encode/decode/transcode
- Onboard STM32 Coprocessor for extended functions
- Power monitoring
- OLED status display
- User control buttons
- RGB LED lighting
Package Contents
- 1 × M5Stack AI Pyramid Computing Box (AX8850, 4GB Version)
Applications
- AI PC & Edge Intelligent Terminals
- Smart Interactive Devices: Home Assistant, AIGC, voice cloning, meeting transcription
- AI Vision Gateways
- Local AI Smart Photo Album (Immich)
- AI‑Powered Intelligent Security (Frigate)
Specifications
| Specification | Parameter |
|---|---|
| SoC | Axera AX8850 |
| CPU | Octa-core Cortex-A55 @ 1.7 GHz |
| NPU | 24 TOPS @ INT8 |
| Video Encoder | 8K @ 30 fps H.264/H.265 encoding, scaling & cropping supported |
| Video Decoder | 8K @ 30 fps H.264/H.265 decoding, 16-channel 1080p parallel decoding, scaling & cropping supported |
| Memory | 4GB 64-bit LPDDR4x, 4266 Mbps (2+2) |
| Storage | 32GB eMMC 5.1 |
| Ethernet | 2× Gigabit Ethernet ports |
| USB-A Ports | 4× USB-A 3.0 (3× external + 1× internal onboard) |
| USB Type-C Ports | 2× USB Type-C (1× USB Host + 1× USB PD 3.0 100W, DC 9V/12V/20V compatible) |
| Multimedia Interface | 2× HDMI 2.0 digital audio/video output ports, 4K@60fps supported |
| Cooling | Turbo cooling fan with EC intelligent thermal control |
| Audio Codec | ES8311 audio codec |
| Microphone | ES7210 microphone array input |
| Speaker | AW8317A amplifier, 4Ω 2W 2040 enclosed speaker |
| RGB LED | 48× RGB LEDs |
| SmartIO Status Display | OLED SSD1306 (32×128); supports IP address, system resource, custom text/graphic display Panel dimensions: 28.54 × 8.58 × 1.22mm |
| User Buttons | 2× user buttons (power on/off + OLED page navigation) |
| Power Requirement | PD input rated ≥ DC 9V@3A (27W) |
| Product Weight | 196.0g |
| Package Dimensions | 144.5 × 105.0 × 62.0mm |
| Gross Weight | 255.0g |
Power RequirementThis device requires a PD adapter with a minimum output of DC 9V@3A (27W). The unit will not power on with a DC 5V supply.
Memory AllocationMemory partitioning between the AI Pyramid system and hardware acceleration resources is defined below:
4GB variant (2GB + 2GB): 2GB allocated to system memory; 2GB reserved for hardware acceleration tasks including NPU compute and video encode/decode.
This partitioning scheme ensures stable system operation while reserving dedicated memory for AI inference and multimedia processing.
I2C Bus NoticeAvoid accessing the RTC chip during microphone recording, as this may cause unstable behavior on the SYS_I2C bus.
RTC Clock NoticeAfter external power loss, the onboard RTC clock module retains timekeeping for up to approximately 20 hours.
Product Comparison
| Product Comparison | AI Pyramid | AI Pyramid-Pro |
|---|---|---|
| DRAM | 4GB 64‑bit LPDDR4x, 4266 Mbps (2+2) | 8GB 64‑bit LPDDR4x, 4266 Mbps (4+4) |
| HD Digital Audio/Video Interface | 2x Output | 1x Input + 1x Output |
| Enclosure Color | Transparent | Gray |