Windows identifies only half of the available RAM.
Windows identifies only half of the available RAM.
I resolved the problem by turning off the PSU before restarting it, which cleared the hardware reservation issue, though the RAM continued at 2133MHz. I adjusted the BIOS settings—switching the power-down mode to Disabled and changing the XMP profile to Default—and then restored the correct one. It’s unclear exactly what caused the initial trouble, but these changes helped. Could you guess what might have been the root cause?