Asus Z9NH-D12 - Manual (Page 46)

2-24 Chapter 2: Hardware information
4. LSI MegaRAID or Intel RSTe selection jumper (3-pin RAID_SEL1)
This jumper allows you to select the PCH SATA RAID mode to use LSI
MegaRAID software or Intel ® Rapid Storage Technology enterprise 3.0 RAID.
Place the jumper caps over pins 1–2 if you want to use the LSI MegaRAID
software RAID Utility (default); otherwise, place the jumper caps to pins 2–3
to use the Intel ® Rapid Storage Technology Enterprise Option ROM Utility.