1. Introduction
This manual provides comprehensive instructions for the installation, configuration, and maintenance of your MACHINIST H81M-PRO S1 motherboard. Please read this manual thoroughly before installing or using the product to ensure proper operation and to prevent damage.
2. Package Contents
Before you begin, please check the contents of your motherboard package:
- 1 x H81M-PRO S1 Motherboard
- 1 x SATA Cable
- 1 x I/O Shield (Blocking)
3. Overview of Components
Familiarize yourself with the layout of your motherboard. The diagram below highlights key components and connectors.

Key Components:
- CPU Socket (LGA 1150): For Intel 4th generation Core i3/i5/i7, Xeon E3/V3 series, Celeron G series, and Pentium G series processors.
- DDR3 DIMM Slots (x2): Supports dual-channel DDR3 memory.
- PCIe x16 Slot (x1): For graphics cards.
- PCIe x1 Slot (x1): For expansion cards.
- NVMe M.2 Slot (x1): For M.2 SSDs.
- SATA 3.0 Ports (x2): For high-speed storage devices.
- SATA 2.0 Ports (x2): For standard storage devices.
- 24-pin ATX Power Connector: Main power input.
- 8-pin ATX 12V Power Connector: CPU power input.
- Fan Headers: 4-pin CPU_FAN1, 3-pin SYS_FAN1.
4. Setup and Installation
4.1. Install CPU & Fan
- Locate the CPU socket (LGA 1150) and lift the locking lever.
- Open the metal load plate.
- Carefully align the CPU with the socket, ensuring the gold triangle on the CPU matches the triangle on the socket. Do not force the CPU.
- Gently place the CPU into the socket.
- Close the metal load plate and push down the locking lever until it clicks into place.
- Apply thermal paste to the CPU (if not pre-applied on the cooler).
- Install the CPU cooler onto the CPU, ensuring it is securely fastened.
- Connect the CPU cooler's 4-pin fan power connector to the CPU_FAN1 header on the motherboard.
Important:
- Always unplug the power cord before installing or removing the CPU.
- Retain the CPU protective cap.
- Do not turn on the computer without a CPU cooler installed.
- Ensure the CPU heatsink forms a tight seal.
- Protect CPU socket pins with a plastic cap when no CPU is installed.
4.2. Install Memory
The motherboard provides two DDR3 DIMM slots (maximum 32GB capacity, 16GB per slot).
- Open the latches on both sides of the DIMM slot outwards.
- Align the memory module with the slot, matching the notch on the module with the key in the slot.
- Insert the memory module firmly into the slot until the latches automatically snap into place.
Important:
- Use DDR3 memory modules.
- Memory modules have a foolproof design; they can only be inserted in one direction.
- For dual-channel mode, install two identical memory modules in both slots.
4.3. Install Expansion Cards
The motherboard has one PCIe x16 slot and one PCIe x1 slot.
- Align the expansion card with the desired PCIe slot.
- Press the card firmly into the slot until it is fully seated.
- Secure the card with a screw to the chassis.
Important:
- Turn off the power supply and unplug the power cable before installing/removing expansion cards.
4.4. Connecting Storage Devices
Connect your SATA hard drives or SSDs to the SATA ports. SATA1 and SATA2 are SATA 3.0 (6Gb/s), while SATA3 and SATA4 are SATA 2.0 (3Gb/s).
For M.2 SSDs:
- Insert your M.2 SSD into the M.2 slot at a 30-degree angle.
- Gently push down the SSD and secure it with the provided screw.
4.5. Back Panel Connectors
Connect your peripherals to the appropriate ports on the rear I/O panel.

- PS/2 Ports (x2): Green for mouse, Purple for keyboard.
- USB 2.0 Ports (x2): For USB 2.0 devices.
- USB 3.0 Ports (x2): For USB 3.0 devices (backward compatible with USB 2.0).
- VGA Port (x1): For analog video output.
- HDMI Port (x1): For digital video output (supports 1080p and 4K).
- RJ45 LAN Port (x1): Gigabit Ethernet for network connection.
- Audio Jacks (x3): Line-in (blue), Line-out (green), Mic-in (pink).
4.6. Internal Connectors
Connect front panel cables and other internal devices.
- F_PANEL1 (Front Panel Header): Connect power LED, HDD LED, power switch, and reset switch cables. Ensure correct polarity.
- SPEAK1 (Speaker Header): Connect the internal chassis speaker.
- JAUDIO1 (Front Panel Audio Header): Connect your chassis's front panel audio jacks.
- JUSB2, JUSB4 (USB 2.0 Headers): Connect front panel USB 2.0 ports.
- FUSB3 (USB 3.0 Header): Connect front panel USB 3.0 ports.
- JCOM1 (Serial Port Connector): For an optional serial port cable.
- ATXPWR1 (24-pin Main Power) & JATXPWR1 (8-pin CPU Power): Connect power supply cables. Ensure a power supply of at least 500W is used for stability.
- CPU_FAN1 (4-pin) & SYS_FAN1 (3-pin): Connect CPU cooler fan and system case fan.
5. Operating the Motherboard (BIOS Setup)
The BIOS (Basic Input and Output System) is firmware that initializes hardware components and loads the operating system. You can access the BIOS setup utility to configure system settings.
5.1. Entering BIOS Setup
To enter the BIOS setup utility:
- Turn on your computer.
- Repeatedly press the DEL key immediately after powering on.
If you miss the window, restart your computer and try again.
5.2. BIOS Settings
The default BIOS settings are optimized for system stability. It is recommended not to alter them unless necessary. Incorrect settings can lead to system instability or failure to boot.
5.3. Resetting BIOS
If you encounter issues, you can reset the BIOS to its default settings:
- Via BIOS Menu: Enter BIOS setup and press F6 to load optimized defaults, then save and exit.
- Via CMOS Jumper (JCMOS1):
- Turn off the computer and unplug the power cord.
- Locate the JCMOS1 jumper on the motherboard.
- Move the jumper cap from pins 1-2 to pins 2-3 for about 5-10 seconds.
- Return the jumper cap to its original position (pins 1-2).
- Plug in the power cord and turn on the computer.
Important:
- Always turn off the computer and unplug the power cord before clearing CMOS data.
- BIOS flashing is risky; only update if you experience problems or require new features.
6. Maintenance
To ensure the longevity and optimal performance of your motherboard:
- Keep the inside of your computer case clean and free of dust. Use compressed air to clear dust from fans and heatsinks regularly.
- Ensure proper airflow within the case by managing cables and ensuring case fans are functioning correctly.
- Avoid exposing the motherboard to extreme temperatures or humidity.
- Periodically check all cable connections to ensure they are secure.
7. Troubleshooting
- No Power: Check if the 24-pin ATX and 8-pin CPU power cables are securely connected from the power supply to the motherboard. Ensure the power supply is switched on.
- No Display: Verify that the graphics card (if used) is properly seated in the PCIe x16 slot and connected to the monitor. If using integrated graphics, ensure the monitor is connected to the motherboard's VGA or HDMI port. Check RAM modules are correctly installed.
- System Instability/Crashes: Ensure all components (CPU, RAM, expansion cards) are properly seated. Check CPU and system temperatures. An insufficient power supply (less than 500W) can cause instability. Reset BIOS to default settings.
- CPU Fan Error: Ensure the CPU fan is correctly connected to the CPU_FAN1 header.
- Boot Device Not Found: Check SATA/M.2 cable connections to storage devices. Verify boot order in BIOS.
- Incorrect Front Panel Functionality: Double-check the F_PANEL1 connections for correct polarity and pin assignment.
8. Specifications
| Feature | Specification |
|---|---|
| Processor Support | Intel 4th Gen Core i3/i5/i7, Xeon E3/V3, Celeron G, Pentium G (LGA 1150) |
| Chipset | Intel H81 |
| Memory Slots | 2 x DDR3 DIMM, Dual Channel |
| Max. RAM Capacity | 32GB (16GB per slot) |
| Storage Interfaces | 2 x SATA 3.0 (6Gb/s), 2 x SATA 2.0 (3Gb/s), 1 x NVMe M.2 (2280) |
| Expansion Slots | 1 x PCIe 2.0 x16, 1 x PCIe 2.0 x1 |
| Rear I/O Ports | 2 x USB 3.0, 2 x USB 2.0, 1 x HDMI, 1 x VGA, 1 x RJ45 LAN, 3 x Audio Jacks, 2 x PS/2 |
| Internal I/O Connectors | 1 x F_PANEL1, 1 x SPEAK1, 1 x JAUDIO1, 2 x USB 2.0 headers, 1 x USB 3.0 header, 1 x JCOM1, 1 x CPU_FAN1, 1 x SYS_FAN1, 1 x 24-pin ATX, 1 x 8-pin ATX 12V |
| LAN | Gigabit Ethernet (1000Mbps) |
| Form Factor | Micro-ATX (220mm x 170mm) |
| Operating Temperature | 0°C to 50°C |
| Operating Humidity | 5% to 95% (non-condensing) |
| Certifications | CE, RoHS |
9. User Tips
- CPU Compatibility: This motherboard supports Intel 4th generation processors (LGA 1150 socket). Ensure your CPU is compatible before installation. A BIOS update is generally not required for standard 4th gen CPUs.
- Form Factor: The Micro-ATX form factor (220mm x 170mm) is compact, making it suitable for smaller PC cases.
- Chipset: It utilizes the Intel H81 chipset, providing reliable performance for its generation.
- Power Supply: For optimal stability, especially with a dedicated graphics card, consider using a power supply of 500W or higher.
- M.2 SSD: The M.2 slot supports NVMe SSDs, offering faster storage performance compared to SATA SSDs.
10. Warranty and Support
For warranty information, technical support, or service inquiries, please contact your retailer or the manufacturer directly. Keep your proof of purchase for warranty claims.
For further details, you may refer to the official user manual PDF available from the seller.





