ASROCK Fatal1ty X399 - 2.3 Installation of Memory Modules (DIMM)

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2.3 Installation of Memory Modules (DIMM)
is motherboard provides eight 288-pin DDR4 (Double Data Rate 4) DIMM slots, and
supports Quad Channel Memory Technology.
Memory Conguration
2 - DIMM 4 - DIMM 8 - DIMM
Priority 1 2 3
DDR4_D2
Populated Populated
DDR4_D1
Populated
DDR4_C2
Populated Populated
DDR4_C1
Populated
DDR4_A1
Populated
DDR4_A2
Populated Populated Populated
DDR4_B1
Populated
DDR4_B2
Populated Populated Populated
1. For quad channel conguration, you always need to install identical (the same brand,
speed, size and chip-type) DDR4 DIMM pairs.
2. It is not allowed to install a DDR, DDR2 or DDR3 memory module into a DDR4 slot;
otherwise, this motherboard and DIMM may be damaged.
3. e DIMM only ts in one correct orientation. It will cause permanent damage to the
motherboard and the DIMM if you force the DIMM into the slot at incorrect orientation.
D2 D1 C2 C1 A1 A2 B1 B2