Onboard Switches and Buttons

The board contains the following buttons and switches that can be used to control board operation in order to fine-tune performance when working on a bare or open-case system.  This is ideal for overclockers and gamers who continually change settings to enhance system performance:

  • MemOK! button

  • BIOS Flashback button

  • Power-on button

MemOK! Button

 

Installing DIMMS that are incompatible with the motherboard may cause system boot failure.  If the system fails to boot during the POST stage and the DRAM_LED near the MemOK! button lights continuously, press and hold the MemOK! switch until the DRAM_LED starts blinking to begin automatic memory compatibility tuning and reboot for successful boot.

 

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  • The DRAM_LED also lights up when the DIMM is not properly installed. Turn off the system and reinstall the DIMM before using the MemOK! function.

  • The MemOK! button does not function under Windows® OS environment.

  • During the tuning process, the system loads and tests failsafe memory settings. It takes about 30 seconds for the system to test one set of failsafe settings. If the test fails, the system reboots and test the next set of failsafe settings. The blinking speed of the DRAM_LED increases, indicating different test processes.

  • Due to memory tuning requirement, the system automatically reboots when each timing set is tested. If the installed DIMMs still fail to boot after the whole tuning process, the DRAM_LED lights continuously. Replace the DIMMs with ones recommended in the Memory QVL (Qualified Vendors Lists) at www.asus.com.

  • If you turn off the computer and replace DIMMs during the tuning process, the system continues memory tuning after turning on the computer. To stop memory tuning, turn off the computer and unplug the power cord for about 5–10 seconds.

  • If your system fails to boot up due to BIOS overclocking, press the MemOK! Button to boot and load the BIOS default settings. A message will appear during POST reminding you that the BIOS has been restored to its default settings.

 

 

USB BIOS Flashback Button

 

USB BIOS Flashback allows you to easily update the BIOS without entering the BIOS or operating system.  Just connect the USB storage device containing the BIOS file into the USB port, press USB BIOS Flashback button for three seconds, and the BIOS is updated automatically.

 

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To use USB BIOS Flashback:

1. Insert the USB storage device into the USB BIOS Flashback port.

• We recommend the use of a USB 2.0 storage device to save the latest BIOS version for better compatibility and stability.

2. Rename the file as X299A.CAP, then copy it to your USB storage device.

3. Shut down your computer.

4. Press the BIOS Flashback button for three seconds until the Flashback LED blinks three times, indicating that the BIOS Flashback function is enabled.

5. Wait until the light goes out, indicating that the BIOS updating process is completed.

 

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  • Do not unplug portable disk, power system, or press the CLR_CMOS button while BIOS update is ongoing, otherwise the update will be interrupted. In case of interruption, please follow the steps again.

  • If the light flashes for five seconds and turns into a solid light, this means that the BIOS Flashback is not operating properly. This may be caused by improper installation of the USB storage device and filename/file format error. If this scenario happens, please restart the system to turn off the light.

  • Updating the BIOS has risks. If the BIOS program is damaged during the process and results in the system’s failure to boot up, please contact the Northern Micro Service Department.

 

Power-On Button

 

The motherboard comes with a power-on button that allows you to power up or wake up the system. The button also lights up when the system is plugged to a power source indicating that you should shut down the system and unplug the power cable before removing or installing any motherboard component.

 

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