ASROCK Fatal1ty X370 Gaming-ITX/ac Serie Mode D'emploi page 27

2.3 Installing Memory Modules (DIMM)
This motherboard provides two 288-pin DDR4 (Double Data Rate 4) DIMM slots,
and supports Dual Channel Memory Technology.
1. For dual channel configuration, you always need to install identical (the same
brand, speed, size and chip-type) DDR4 DIMM pairs.
2. It is unable to activate Dual Channel Memory Technology with only one memory
module installed.
3. 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.
DDR4 UDIMM Maximum Frequency Support
A-Series APUs:
UDIMM Memory Slot
A1
-
SR
-
DR
SR
DR
Ryzen CPUs:
UDIMM Memory Slot
A1
-
SR
-
DR
SR
DR
SR: Single rank DIMM, 1Rx4 or 1Rx8 on DIMM module label
DR: Dual rank DIMM, 2Rx4 or 2Rx8 on DIMM module label
Frequency
(Mhz)
B1
SR 2400
- 2400
DR 2400
- 2400
SR 2400
DR 2400
Frequency
(Mhz)
B1
SR 2667
- 2667
DR 2667
- 2667
SR 2667
DR 2667
Fatal1ty X370 Gaming-ITX/ac Series
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