ASROCK B550 Phantom Gaming-ITX/ax Manual 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.
AMD non-XMP Memory Frequency Support
Ryzen Series CPUs (Matisse):
UDIMM Memory Slot
A1
SR
-
DR
-
SR
DR
Ryzen Series APUs (Renoir):
UDIMM Memory Slot
A1
SR
-
DR
-
SR
DR
Frequency
(Mhz)
B1
- 3200
SR 3200
- 3200
DR 3200
SR 3200
DR 3200
Frequency
(Mhz)
B1
- 3200
SR 3200
- 3200
DR 3200
SR 3200
DR 3200
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