ASUS P7H55/USB3 Manual Do Utilizador

ASUS P7H55/USB3

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•  The DRAM_LED also lights when the DIMM is not properly installed. Turn off the system 

and reinstall the DIMM before using the MemOK! function.

•  Press the MemOK! switch under Windows™ OS environment will reboot the computer 

and start memory tuning.

•  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.

•  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) in this user manual or on the ASUS website 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 unplog the power cord for about 5–10 seconds.

•  If your system fail to boot due to BIOS overclocking, press the MemOK! switch to boot 

and load BIOS default settings. A messgae will appear during POST reminding you that 

the BIOS has been restored to its default settings.

Onboard switch allows you 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.
1. 

MemOK! switch
Installing DIMMs that are incompatible with the motherboard may cause system 

boot failure, and the DRAM_LED near the MemOK! switch lights continuously. Press 

and hold the MemOK! switch until the DRAM_LED starts blinking to begin automatic 

memory compatibility tuning for successful boot.