That information is found on page 18 of the downloadable motherboard manual. Enable the XMP profile will set the Memory Clock, Timing, and DRAM voltage. You may have two profiles to choose from. If you don't know how to use the new UEFI bios, try reading the instruction manual.
Extreme Memory Profile (X.M.P.)
Allows the BIOS to read the SPD data on XMP memory module(s) to enhance memory performance when
enabled.
Disabled Disables this function. (Default)
Profile1 Uses Profile 1 settings.
Profile2 Uses Profile 2 settings