ASRock Fatal1ty X399 Professional Gaming User Manual - Page 28

Installation of Memory Modules (DIMM), Memory Configuration

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2.3 Installation of Memory Modules (DIMM) This motherboard provides eight 288-pin DDR4 (Double Data Rate 4) DIMM slots, and supports Quad Channel Memory Technology. 1. For quad channel configuration, 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. The DIMM only fits 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. Memory Configuration Priority DDR4_D2 DDR4_D1 DDR4_C2 DDR4_C1 DDR4_A1 DDR4_A2 DDR4_B1 DDR4_B2 2 - DIMM 1 Populated Populated D2 D1 C2 C1 4 - DIMM 2 Populated Populated Populated Populated 8 - DIMM 3 Populated Populated Populated Populated Populated Populated Populated Populated A1 A2 B1 B2 English 20

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English
20
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 Configuration
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 configuration, 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 fits 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