ASROCK X370M Pro4-F, Manual

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2.3 Installing Memory Modules (DIMM)
This motherboard provides four 288-pin DDR4 (Double Data Rate 4) DIMM slots,
and supports Dual Channel Memory Technology.
AMD non-XMP Memory Frequency Support
A-Series APUs (Bristol Ridge):
Ryzen Series CPUs (Matisse):
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 or three
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.
UDIMM Memory Slot
Frequency
(Mhz)
A1 A2 B1 B2
- SR - - 2400
- DR - - 2400
- SR - SR 2400
- DR - DR 2133
SR SR SR SR 1866
SR/DR DR SR/DR DR 1866
UDIMM Memory Slot
Frequency
(Mhz)
A1 A2 B1 B2
- SR - - 3200
- DR - - 3200
- SR - SR 3200
- DR - DR 3200
SR SR SR SR 2933
SR/DR DR SR/DR DR 2667
SR/DR SR/DR SR/DR SR/DR 2667