Product Description
M4-ATX-HV – Intelligent Automotive / Car DC-DC ATX PC Power Supply
M4-ATX-HV is a high-power, intelligent automotive DC-DC ATX power supply designed for car PCs and battery-powered computing applications. It is ideal for use in cars, boats, RVs, electric carts, and solar-powered systems.
Designed to both supply power and control the motherboard ON/OFF switch based on ignition status, the M4-ATX-HV features a wide 6–34V DC input range, allowing it to survive severe engine cranking conditions (down to 6V) and transient over-voltage events commonly found in automotive environments.
Using patent-pending HyperWatt™ technology, the M4-ATX-HV delivers exceptional power output in a compact, fanless form factor.
Key Features & Advantages
⚡ Intelligent Power & Ignition Control
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Controls motherboard ON/OFF based on ignition signal
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Programmable shutdown and sleep modes
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Configurable behaviour via optional serial cable
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Firmware can be customised for different use cases
🚗 Automotive-Grade DC-DC Design
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Wide input voltage range: 6–34V DC
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Handles engine cranking and voltage transients
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Supports multi-chemistry battery systems
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Ideal for vehicle, marine, RV, and solar installations
🖥 Compatibility & Performance
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Supports 20-pin and 24-pin ATX motherboards
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Compatible with:
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Intel Core Duo and newer Intel CPUs
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AMD processors
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VIA platforms
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High-efficiency design with low heat output
🔇 Silent & Compact Operation
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100% fanless design
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No moving parts
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Silent and maintenance-free
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Small footprint with high power density
Software & Configuration Tools
1️⃣ M4-ATX System Tray Monitor & Setup Application
This Windows install kit includes two applications:
🔹 M4ATXTray.exe – System Tray Monitor
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Monitors input/output voltages and temperature
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Requires USB connection to PC
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Displays real-time data via a Windows system tray icon
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Mouse-over display for quick status
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Supports customisable skins
📥 Download: M4ATX System Tray Monitor & Setup Application
(Example skin screenshots available)
🔹 M4_ATX.exe – Setup & Configuration Tool
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Configure ignition voltage limits
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Set shutdown voltage thresholds
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Adjust power timing and behaviour parameters
2️⃣ M4-ATX OEM Setup Application
📥 Download: M4ATX OEM Setup Application
⚠️ Warning:
This application is intended for OEMs and advanced users only. Incorrect settings may damage the power supply or connected components. Mini-Box is not responsible for misuse.
3️⃣ Linux / macOS / *BSD API Support
📥 Download: m4api.tar.gz
Example Commands
Monitor input & output voltages:
Display PSU configuration:
Update configuration parameters:
OEM & Reseller Integration
Firmware on the M4-ATX-HV can be customised to support specific power behaviours.
OEMs, system integrators, and resellers are welcome.
📧 Please contact us via email with your custom firmware or integration requirements.
Ideal Applications
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Car PC & automotive computing
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Fleet & telematics systems
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Industrial embedded PCs
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Solar-powered systems
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Marine & RV computing
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Mobile kiosks and field systems