How do I use the MemOK! II function to troubleshoot memory issues?
The MemOK! II switch is enabled by default and allows automatic memory re-training when the motherboard is unresponsive due to memory problems. When activated, the Mem_LED will light up during re-training and turn off when complete. The function does not work under Windows OS and the system will reboot multiple times during the training process.
From the official ASUS Asus Prime Z390 A Motherboard User manual, page 26
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