ASUS TUF GAMING B660M-PLUS WIFI D4 Motherboard User Manual

Package Contents

• ASUS TUF GAMING B660M-PLUS WIFI D4 Motherboard
• Accessories: 2 x SATA 6Gb/s cables; 1 x ASUS Wi-Fi antenna; 1 x M.2 rubber package; 1 x M.2 SSD screw package; 1 x TUF GAMING sticker
• Utility Disc: 1 x Driver and utility CD
• Manuals: 1 x TUF Certification Card; 1 x User Manual

Internal Connectors

1. CPU Socket

   This motherboard is equipped with an LGA1700 socket, designed for 12th Generation Intel® Core™, Pentium® Gold, and Celeron® processors. Refer to the "Central Processing Unit (CPU)" chapter for more details.

2. DDR4 Memory Slots

   This motherboard features four DDR4 (Double Data Rate) memory slots. You can install 2GB, 4GB, 8GB, 16GB, or 32GB Non-ECC, Un-buffered memory modules in these slots. Refer to the "System Memory" chapter for more details.

3. Expansion Slots

   This motherboard provides two PCIe x16 slots and one PCIe 4.0 x1 slot, supporting PCI Express specification compliant expansion cards.

   • The PCIe x16(G5) slot supports PCIe 5.0 x16 mode, and the PCIe x16(G3) slot supports PCIe 3.0 x4 mode.
   • Intel® Optane Memory H Series requires installation in a PCIe slot connected to the PCH.

4. Fan Headers

   Connect fan power cables to the fan power headers, ensuring the black wire aligns with the ground (GND) pin. Connecting fan power is crucial for system cooling to prevent overheating and potential damage to components. Note: These headers are not pin headers; do not place jumper caps on them. The CPU_FAN header supports CPU fans up to 1 Amp (12 Watts).

5. Motherboard Power Connectors

   These power connectors are for connecting to a power supply unit (PSU). The PSU connectors are designed to fit into the motherboard power slots in only one direction. Ensure correct alignment before plugging in.

   ! You must connect the 8-pin power connector; otherwise, the system may not start.

6. M.2 Slots (Key M)

   These slots are for installing M.2 devices, such as M.2 solid-state drives.

   • M.2_1 slot supports M Key type 2242/2260/2280 storage devices (Intel® 12th Gen processors support PCIe 4.0 x4 mode).
   • M.2_2 slot supports M Key type 2242/2260/2280 storage devices (supports PCIe 4.0 x4 mode).
   • Intel® Optane Memory H Series installed in M.2 slots connected to the PCH support Intel® Rapid Storage Technology.

7. SATA 6Gb/s Connectors

   These connectors support SATA 6Gb/s cables for connecting SATA devices.

8. USB 3.2 Gen 1 Header (Type-C®)

   This header is for connecting a USB 3.2 Gen 1 module to expand USB 3.2 Gen 1 Type-C® ports. USB 3.2 Gen 1 data transfer rates reach up to 5Gb/s.

9. USB 3.2 Gen 1 Header

   This header is for connecting a USB 3.2 Gen 1 module to expand USB 3.2 Gen 1 ports. USB 3.2 Gen 1 data transfer rates reach up to 5Gb/s. USB 3.2 Gen 1 modules are optional accessories.

10. USB 2.0 Header

    This header is for connecting a USB 2.0 module to expand USB 2.0 ports on the front or rear panel. USB 2.0 data transfer rates reach up to 480Mb/s. USB 2.0 modules are optional accessories.

11. Addressable Gen 2 Header

    This header is for connecting addressable RGB WS2812B LED strips or WS2812B-based LED strips. The addressable Gen 2 header supports WS2812B addressable RGB LED strips (5V/Data/Ground) with a total current output limit of 3 Amps (5 Volts). The addressable header on this motherboard supports up to 500 LEDs.

    ! Before installing or removing any components, ensure the PSU power switch is turned OFF. For safety, unplug the PSU power cord before proceeding. This prevents damage to the motherboard, peripherals, or components due to residual power.

12. AURA RGB Strip Header

    This header is for connecting RGB LED strips. The RGB LED header supports 5050 RGB LED strips (+12V/G/R/B) with a total current output limit of 3 Amps and a maximum length of 3 meters. The brightness and color may vary depending on the LED strip. If your LED strip does not light up, check the RGB LED extension cable and ensure the LED strip is connected to the correct header and the 5V pin aligns with the 5V header on the motherboard. Addressable RGB LED strips only light up when the system is operating. Addressable RGB LED strips are optional accessories.

13. CMOS Clear Header

    This header allows you to clear system configuration data, such as date, time, and system passwords, stored in CMOS memory.

    1. Turn off the computer and unplug the power cord.
    2. Short the two pins of the CLRTC jumper with a metal object, such as a screwdriver.
    3. Plug in the power cord and turn on the computer.
    4. During the boot process, press the key to enter the BIOS setup screen and reset BIOS settings.

    If the above method does not work, remove the coin-cell battery and short the pins again to clear CMOS RTC RAM data. Reinstall the battery after clearing CMOS.

14. Serial Port Connector

    This connector is for serial port (COM) connections. Connect the serial port module's cable to this header and install the module in an empty slot on the computer case's rear panel. COM modules are optional accessories.

15. Front Panel Audio Header

    This header is for connecting front panel audio cables, allowing control of audio output/input from the front panel and supporting HD Audio. Connect one end of the front panel audio module's cable to this header. It is recommended to connect a high-definition audio front panel module to this header for high-definition audio functionality. If installing a high-definition audio front panel module, set the Front Panel Type item in the BIOS to [HD].

16. System Panel Connector

    This connector supports various case functions.

    • System Power LED Header (4-pin PLED): Connects to the system power LED on the computer case. The LED stays on when the computer is on and blinks when in sleep mode.
    • Storage Device Activity LED Header (2-pin HDD_LED): Connects to the storage device activity LED on the computer case. The LED lights up when the storage device is accessed.
    • Chassis Speaker Header (4-pin SPEAKER): Connects to the speaker in the computer case. A beep indicates normal boot; different beep patterns indicate boot errors.
    • Power/Soft-off Button (2-pin PWRSW): Connects to the power button on the computer case. Depending on BIOS or OS settings, this button can switch between normal operation and sleep mode, or normal operation and soft-off mode.
    • Reset Button Header (2-pin RESET): Connects to the reset button on the computer case. Pressing the button on the case restarts the computer.
    • Chassis Intrusion Detection Header (2-pin CHASSIS): For computer cases with chassis intrusion detection. Requires an external detection device (e.g., chassis intrusion sensor or micro switch). If this function is enabled, any movement of case parts will be detected and signaled to this header, logging the chassis intrusion event.

17. Thunderbolt™ Header

    The Thunderbolt™ header allows connection of an optional Thunderbolt™ I/O card, enabling daisy-chaining of multiple Thunderbolt™ devices and a DisplayPort monitor. Optional Thunderbolt™ I/O cards and cables are sold separately. Refer to your Thunderbolt™ card manufacturer's website for compatibility information.

18. LEDs

    The LEDs indicate the status of the CPU, memory, graphics card, and boot device after the motherboard powers on. If an error occurs, the LED next to the problematic device will remain lit until the issue is resolved. The LEDs provide the most likely cause of errors, but actual causes may vary.

Rear Panel Connectors

1. DisplayPort Connector
2. USB 2.0 Ports
3. USB 3.2 Gen 1 Ports
4. 2.5G LAN Port
5. Center/Subwoofer Audio Out (Orange)
6. Rear Audio Out (Black)
7. Side Audio Out (Light Blue)
8. HDMI® Connector
9. USB 3.2 Gen 2 Ports (Blue, Type-A)
10. USB 3.2 Gen 2x2 Port (USB Type-C®)
11. Intel® Wi-Fi 6 Connector
12. S/PDIF Out Connector
13. Microphone Port (Pink)
14. Audio Out Port (Light Green)

Motherboard Installation and Usage

Preparation for Installation

Before installing the motherboard, prepare the necessary tools. Refer to the QR code for a guide on installing the motherboard into the case and connecting front panel I/O headers.

Central Processing Unit (CPU)

This motherboard is equipped with an LGA1700 socket, designed for 12th Generation Intel® Core™, Pentium® Gold, and Celeron® processors.

• After installing the motherboard, keep the LGA1700 socket protective cover. ASUS provides warranty and repair services only for motherboards with the LGA1700 socket protective cover.
• This warranty does not cover damage to the processor socket caused by loss, incorrect installation, or improper removal of the protective cover.

System Memory

This motherboard features four DDR4 (Double Data Rate) memory slots. For installation steps and fan installation, scan the QR code.

• To ensure system stability, use memory modules with the same CAS (CAS-Latency) value. It is recommended to use memory modules of the same capacity and model from the same manufacturer.
• 12th Generation Intel® processors natively support 3200/3000/2933/2800/2666/2400/2133 MHz.
• For full load (4 DIMMs) or overclocking, memory may require enhanced cooling for stable operation.
• Visit the ASUS website (https://www.asus.com/tw) for the latest Qualified Vendor List (QVL). Supported memory frequencies depend on the processor type. Scan the QR code for recommended memory settings.

Expansion Cards

This motherboard provides PCIe x16 and PCIe 4.0 x1 expansion slots to support expansion cards compliant with their respective specifications. For installation steps of memory and expansion cards, scan the QR code.

! Before installing or removing any expansion card, unplug the computer's power cord to prevent accidental discharge of residual electricity.

Storage Connectors

This motherboard is equipped with four SATA 6Gb/s connectors for connecting SATA devices via SATA 6Gb/s cables. It also features two M.2 slots for installing M.2 devices, such as solid-state drives. Scan the QR code for detailed instructions on installing SATA devices and connecting power to components.

• M.2_1 slot supports M Key type 2242/2260/2280 storage devices (Intel® 12th Gen processors support PCIe 4.0 x4 mode).
• M.2_2 slot supports M Key type 2242/2260/2280 storage devices (supports PCIe 4.0 x4 mode).
• Intel® Rapid Storage Technology supports SATA RAID 0/1/5/10. Intel® Optane Memory H Series installed in M.2 slots connected to the PCH support Intel® Rapid Storage Technology.

Motherboard Installation into Case

When installing the motherboard into the computer case, ensure the motherboard size is compatible with the case. The motherboard's external connectors should face the rear panel of the computer case, which has corresponding cutouts. Scan the QR code for detailed steps on installing the motherboard into the case and connecting front panel I/O headers.

Learn More

For more information about this motherboard, visit the ASUS website (https://www.asus.com/tw) and search for the product model, or scan the QR code. MyASUS provides comprehensive product services to help users resolve product issues, optimize performance, manage ASUS software, maintain a clean desktop, and expand storage space. Scan the QR code for installation guides and FAQs.

BIOS Information

Scan the QR code for BIOS update instructions and RAID information.

When downloading or updating BIOS files, rename the file to ASUS.CAP or TGB660PW.CAP for this motherboard.

BIOS Setup Utility

The BIOS setup utility is used to update or configure BIOS settings. The BIOS setup screen displays function keys and brief instructions to assist with system configuration.

Entering the BIOS Setup Utility at Boot

During the Power-On Self-Test (POST), press the or key. If or is not pressed, POST will continue.

Entering the BIOS Setup Utility After POST

Press + + keys. Restart the computer by pressing the button on the case. You can also shut down and restart the computer. If both methods fail, try this option. Forcing a system restart using the power button, Reset button, or + + keys can corrupt your data or system. It is recommended to properly shut down the running system.

• The BIOS setup screen in this section is for reference only and may differ from what you see.
• Visit the ASUS website (https://www.asus.com/tw) to download the latest BIOS.
• Default BIOS settings ensure optimal performance in most situations. If the system becomes unstable after changing BIOS settings, load default BIOS settings for compatibility and stability. Select "Load Optimized Defaults" in the Exit menu to restore default BIOS settings.
• If the system fails to boot after changing any BIOS settings, try clearing CMOS data to restore the motherboard to default settings.

BIOS Menu Screen

The BIOS setup utility has two modes: EZ Mode and Advanced Mode. Press to switch between modes.

Using ASUS EZ Flash 3 to Update BIOS

ASUS EZ Flash 3 allows you to update the BIOS easily without entering the operating system.

Load default BIOS settings to ensure system compatibility and stability. Select "Load Optimized Defaults" in the Exit menu to restore default BIOS settings.

Follow these steps to use EZ Flash 3 to update the BIOS:

1. Insert a USB flash drive containing the latest BIOS file into a USB port.
2. Enter the BIOS setup utility in Advanced Mode, navigate to the Tool menu, and select ASUS EZ Flash 3 Utility. Press to launch it.
3. Use the left/right arrow keys to select the "Drive" area.
4. Use the up/down arrow keys to find the USB flash drive with the latest BIOS file and press .
5. Use the left/right arrow keys to select the "Folder" area.
6. Use the up/down arrow keys to find the latest BIOS file, then press to start the BIOS update. The computer will restart after the update is complete.

! This function only supports single-partition USB flash drives formatted with FAT 32/16. Do not turn off or reset the system during the BIOS update to avoid boot failure.

Safety Information

Operational Safety

• Before installing the motherboard and hardware, carefully read the information provided in this manual.
• Before using the product, ensure all cables and power cords are correctly connected. If you find any significant defects, contact your dealer immediately.
• To prevent electrical short circuits, keep all unused screws, paper clips, and other small parts away from the motherboard and computer case.
• Dust, humidity, and drastic temperature changes can affect the motherboard's lifespan. Avoid placing it in such environments. Do not place the computer case in locations prone to shaking.
• For any technical issues with this product, contact a certified or experienced technician.

The left icon indicates that this product (electronic device) cannot be disposed of in household waste. Please follow local regulations for disposal. The icon on the right indicates that batteries cannot be disposed of in household waste.

Substance of Concern Information

Note 1: "○" indicates that the percentage of the restricted substance does not exceed the threshold.

Note 2: "—" indicates that the restricted substance is excluded.

Battery Recycling

ASUS REACH: Please comply with REACH (Registration, Evaluation, Authorisation, and Restriction of Chemicals) regulations. Chemical substance information for our products is available on the ASUS REACH website. For details, please visit http://csr.asus.com/english/REACH.html.

Service Location Inquiry

You can find the nearest service location at https://www.asus.com/tw/support/Service-Center/Taiwan or call the toll-free service hotline at 0800-093-456 for assistance.

FCC Compliance Information

Responsible Party: Asus Computer International

Address: 48720 Kato Rd., Fremont, CA 94538, USA

Phone / Fax No: (510)739-3777 / (510)608-4555

This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.

This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
• Consult the dealer or an experienced radio/TV technician for help.

RF Exposure Warning

This equipment must be installed and operated in accordance with provided instructions and the antenna(s) used for this transmitter must be installed to provide a separation distance of at least 20 cm from all persons and must not be co-located or operating in conjunction with any other antenna or transmitter. End-users and installers must be provided with antenna installation instructions and transmitter operating conditions for satisfying RF exposure compliance.

HDMI Compliance Statement

The terms HDMI, HDMI High-Definition Multimedia Interface, and the HDMI Logo are trademarks or registered trademarks of HDMI Licensing Administrator, Inc.

Please Note!

This product comes with a three-year product warranty. Tampering with or replacing the original warranty serial number label will void the warranty, and repair services will not be provided.

ASUS Contact Information

ASUSTeK COMPUTER INC. (Taiwan)

Address: 112, No. 15, Li-Te Rd., Beitou Dist., Taipei City, Taiwan

ASUSTeK COMPUTER INC. (Global)

Address: 112, No. 15, Li-Te Rd., Beitou Dist., Taipei City, Taiwan

ASUS COMPUTER INTERNATIONAL (USA)

Address: 48720 Kato Rd., Fremont, CA 94538, USA

ASUS COMPUTER GmbH (Germany/Austria)

Address: Harkortstrasse 21-23, 40880 Ratingen, Germany

ASUSTeK (UK) LIMITED

Address: 1st Floor, Sackville House, 143-149 Fenchurch Street, London, EC3M 6BL, England, United Kingdom

Service and Support

Visit https://www.asus.com/tw/support/ or scan the QR code to access the ASUS technical support page.