MACHINIST B75-PRO-U5 Motherboard

Specifications

Overview of Components

The MACHINIST B75-PRO-U5 motherboard features the LGA 1155 socket for Intel 2nd/3rd Gen processors. Key components and connectors include:

• CPU Socket: LGA 1155.
• RAM Slots: Two DDR3 DIMM slots supporting up to 16GB.
• Expansion Slots: One PCIe 3.0 x16 slot, one PCIe 2.0 x1 slot, and one PCI slot.
• Storage Connectors: SATA 3.0 (6Gb/s) and SATA 2.0 ports, plus an M.2 slot for SSDs.
• Internal Headers: F_PANEL1 (front panel connectors), SPEAK1 (speaker), JAUDIO1 (front audio), JCOM1 (serial port), CPU_FAN1, SYS_FAN1~3 (fan connectors), JUSB2/JUSB4 (USB 2.0 headers), FUSB3 (USB 3.0 header).
• Power Connectors: 24-pin ATX and 4-pin ATX power connectors.
• Rear I/O Ports: PS/2 (keyboard/mouse), HDMI, VGA, USB 3.0, USB 2.0, RJ45 Gigabit LAN, and Audio jacks.

Package Contents: B75 Motherboard * 1, SATA Cable * 1, I/O Blocking * 1.

Install CPU & Fan

Follow these steps to install the CPU and heatsink:

1. Lift the CPU socket retention lever.
2. Align the CPU's triangle indicator with the socket's corresponding mark.
3. Gently place the CPU into the socket.
4. Lower the retention lever to secure the CPU.
5. Apply an even layer of thermal paste to the CPU surface.
6. Mount the CPU cooler bracket onto the motherboard.
7. Place the heatsink onto the CPU.
8. Secure the heatsink using the provided screws or clips.
9. Connect the CPU heatsink's 4-pin fan power connector to the CPU_FAN header on the motherboard.

Important Notes:

• Ensure the motherboard supports the CPU.
• Always unplug the power cord before installation/removal to prevent damage.
• Retain the CPU protective cap after installation.
• Do not power on the system without a CPU cooler installed to avoid overheating.
• Confirm the heatsink forms a tight seal with the CPU.
• Protect CPU socket pins with the plastic cap when the CPU is not installed.
• Do not force the CPU into the socket; ensure the lever is lifted.

Install Memory

The motherboard has 2 DDR3 DIMM slots with a maximum capacity of 16GB.

1. Open the latches on both sides of the memory slot.
2. Align the notch on the memory module with the slot and insert it.
3. Close the latches on both sides to secure the memory.

Important Notes:

• Not compatible with DDR3 ECC memory. It is recommended to use memory modules of the same capacity, brand, speed, and chips.
• The motherboard features a memory detection light.
• Always turn off the computer and unplug the power cord before installing memory.
• Memory modules are keyed for single-direction installation.
• Memory stability depends on the CPU and overclocking settings.
• Dual Channel Technology requires two memory modules.

Install Expansion Card

The motherboard provides a PCI Express 3.0 x16 expansion slot and other PCIe slots.

Place the expansion card into an available PCI Express slot and press down until it is fully inserted.

Important Notes:

• Always turn off the power supply and unplug the power cable before adding or removing expansion cards to prevent hardware damage.
• Incorrect installation can cause short circuits, potentially damaging the card or motherboard.

Back Panel Connectors

The rear I/O panel provides connectivity for external devices:

• PS/2 Ports: One green port for a mouse, one purple port for a keyboard.
• HDMI Interface: Supports 4K and 1080p video output.
• VGA Port: Supports analog video signal transmission for displays.
• USB 3.0 Ports: Blue ports supporting USB 3.0 specifications for high-speed data transfer.
• USB 2.0 Ports: Black ports supporting USB 2.0 specifications.
• RJ45 LAN Port: Gigabit Ethernet for internet connection up to 1000Mbps. The LAN port LEDs indicate link status and speed:
  • Link/Activity LED: Off (No Link), Yellow (Linked).
  • Speed LED: Off (10 Mbps connection), Green (100/1000 Mbps connection).
• Audio Port: Includes Line-in, Line-out, and Mic-in jacks for audio devices.

Internal Connectors

Various internal headers allow connection of front panel components and other devices:

F_PANEL1 Connector (Front Panel Header)

This header connects the power button, reset button, power LED, and HDD LED:

• Pin 1-2: Power LED (+/-)
• Pin 3-4: HDD LED (+/-)
• Pin 5-6: Power Switch
• Pin 7-8: Reserved
• Pin 9-10: Reset Switch

SPEAK1 Connector (Speaker Header)

Connects to the system speaker/buzzer.

• Pin 1: Buzzer
• Pin 2: Buzzer
• Pin 3: Speaker
• Pin 4: Speaker

JAUDIO1 Connector (Front Audio Header)

This 10-pin header connects front panel audio jacks:

Important Note: Incorrect connections can prevent device operation or cause damage.

SATA 3.0 Connectors; SATA 2.0 Connectors

These are SATA 6Gb/s interface ports, each supporting a single SATA device.

M.2 Slot

Insert your M.2 SSD into the M.2 slot at a 30-degree angle and secure it with the provided screw.

JCMOS1: CMOS Discharge (JBAT)

This jumper is used to clear the CMOS settings:

• Initial State: Cap on pins 1-2.
• Discharge: Move the cap to pins 2-3 and wait for approximately 3 minutes.
• Restore: Return the cap to pins 1-2 after discharge is complete.

Important Note: Always turn off the computer and unplug the power cord before clearing CMOS data.

JCOM1: Serial Port Connector

This connector provides one serial port via an optional COM port cable. The pinout is:

ATXPWR1, JATXPWR1: Power Connectors

These connectors supply power to the motherboard. Ensure the power supply is turned off and all devices are installed before connecting.

Important Note: A power supply of at least 500W is recommended for stable operation. Insufficient power can lead to system instability.

CPU_FAN1, SYS_FAN1~3: Fan Connectors

CPU_FAN: A 4-pin connector for the CPU heatsink fan, supporting PWM speed regulation based on load and temperature.

SYS_FAN: 3-pin connectors for case fans, which do not have PWM adjustment capability.

JUSB2, JUSB4: USB 2.0 Connectors

These headers conform to USB 2.0 specifications for connecting front panel USB 2.0 ports.

FUSB3: USB 3.0 Connector

This header conforms to USB 3.0 and USB 2.0 specifications for connecting front panel USB 3.0 ports.

BIOS Setup

BIOS (Basic Input and Output System) stores system hardware parameters in the motherboard's CMOS. It initializes, configures, and tests computer hardware during startup, enabling the OS to function. Key functions include Power-On Self-Test (POST), saving system parameters, and loading the operating system. The BIOS Setup program allows modification of system configuration settings.

When power is off, the motherboard's battery supplies power to the CMOS to retain configuration values.

Important Note: BIOS flashing is risky. It is recommended not to flash the BIOS unless necessary, and to proceed with caution to avoid system malfunction.

BIOS Setup (Defaults)

Default settings are optimized for system stability. Altering them without need may cause instability or boot failure. BIOS items are regularly updated for performance improvements, and descriptions are for reference only.

Important Note: BIOS items may differ slightly from the latest versions.

Enter BIOS Setup

When the computer starts, it performs a self-test. Upon completion, a message like "Press DEL key to enter Setup Menu" is displayed. Press the <Delete> key at this time to enter BIOS setup.

If the message disappears quickly, restart the computer by turning it off and on, pressing the <Reset> button, or using <Ctrl>+<Alt>+<Delete>. Repeatedly pressing the "Del" key immediately after starting is recommended to ensure entry into BIOS mode.

Current Version (BIOS Screenshot Description)

The Aptio Setup Utility screen, developed by American Megatrends, Inc., provides system configuration. It includes sections for Main, Advanced, Chipset, Boot, Security, and Save & Exit. Key information displayed includes:

• BIOS Information: Vendor (American Megatrends), Version (AXB75 0.10 x64), Board Name (B75 MB).
• Processor Information: Name (e.g., Intel(R) Core(TM) i5-3570 CPU), Frequency, Processor ID, Cores/Threads.
• System Date and Time: Displays current date and time.
• Navigation: Keys like Tab, Enter, +/-, F1, F2, F9, F10, and ESC are used for navigation and selection.

Important Note: Functions may vary depending on the specific product.

Reset BIOS

To restore default BIOS settings:

• Go to BIOS Setup and press F6 to load optimized defaults.
• Short the Clear CMOS jumper on the motherboard.

Important Note: Ensure the computer is powered off before clearing CMOS data. Refer to the Clear CMOS jumper section for details.