Installing Memory Modules (Dimm) - ASROCK B550D4U User Manual

2.5 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
UDIMM Memory Slot
A2 A1 B2 B1
- SR - -
- DR - -
- SR - SR
- DR - DR
SR SR SR SR
DR DR DR DR
Matisse Renoir
Freq (Mhz) Freq (Mhz)
3200 3200
3200 3200
3200 3200
3200 3200
2933 2933
2666 2666
B550D4U-2T / B550D4U
Vermeer Cezanne
Freq (Mhz) Freq (Mhz)
3200 3200
3200 3200
3200 3200
3200 3200
2933 2933
2666 2666
21