with new bios update, asus provides some minor change to performance increased and new timing setting.
XMP Tweaked function based on XMP I and some timings that impact performance.
with XMP Tweaked selected, you may need to have good case airflow or good memory cooling system to expect system stable.
DRAM RAS# to CAS# Delay Write aka tRCDW.
this timing not related to DRAM mode register, only for CPU imc side, so this timing may not impact system performance visible.