ASRock B550 Pro4 User Manual - Page 27
Installing Memory Modules (DIMM), DDR4 UDIMM Maximum Frequency Support
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B550 Pro4 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 B1 B2 Frequency (Mhz) - 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 English 21
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