Installing Memory Modules (Dimm) - ASROCK B550 Phantom Gaming 4/ac User Manual

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.
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.
DDR4 UDIMM Maximum Frequency Support
Ryzen Series CPUs (Matisse):
UDIMM Memory Slot
A1 A2
- SR
- DR
- SR
- DR
SR SR
SR/DR DR SR/DR
SR/DR SR/DR SR/DR
Frequency
(Mhz)
B1 B2
- - 3200
- - 3200
- SR 3200
- DR 3200
SR SR 2933
DR 2667
SR/DR 2667
B550 Phantom Gaming 4/ac
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