Asus Z9NA-D6 - Manual (Page 34)

2-14 Chapter 2: Hardware information
2 CPU Configuration
DIMM_A1 DIMM_B1 DIMM_C1 DIMM_D1 DIMM_E1 DIMM_F1
1 DIMMs X
2 DIMMs X X
4 DIMMs X X X X
6 DIMMs X X X X X X