1) You have not set the BIOS to use the XMP profile.
2) The BIOS is incorrectly reading the XMP profile.
3) The BIOS cannot read the XMP profile.
4) The XMP profile is incorrect.
Solution: Enter the BIOS, access the RAM settings, set the:
-- latencies to match those on the RAM stickers, e.g. 7-7-7-20
-- RAM voltage to the value shown on the stickers, e.g., 1.65
-- Speed (frequency) to 1600MHz.
Save and exit the BIOS. Let the computer POST and boot to the OS. Then check the RAM settings using CPU-Z.