Asus TUF GAMING B450M-PRO S Instruction Manual - Page 19
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1.4
System memory
This motherboard comes with four Double Data Rate 4 (DDR4) Dual Inline Memory Module
(DIMM) sockets. The figure illustrates the location of the DDR4 DIMM sockets:
•
You may install varying memory sizes in Channel A and Channel B. The system
maps the total size of the lower-sized channel for the dual-channel configuration. Any
excess memory from the higher-sized channel is then mapped for single-channel
operation.
•
Always install DIMMs with the same CAS latency. For optimal compatibility, we
recommend that you install memory modules of the same version or date code (D/C)
from the same vendor. Check with the retailer to get the correct memory modules.
•
A DDR4 memory module is notched differently from a DDR, DDR2, or DDR3 module.
DO NOT install a DDR, DDR2, or DDR3 memory module to the DDR4 slot.
•
The default memory operation frequency is dependent on its Serial Presence Detect
(SPD), which is the standard way of accessing information from a memory module.
Under the default state, some memory modules for overclocking may operate at a
lower frequency than the vendor-marked value.
•
For system stability, use a more efficient memory cooling system to support a full
memory load.
•
Refer to www.asus.com for the latest Memory QVL (Qualified Vendors Lists).
Recommended memory configurations
DIMM_B2*
ASUS TUF GAMING B450M-PRO S
DIMM_A1
DIMM_A2*
DIMM_B1
DIMM_B2*
DIMM_A2*
DIMM_B2*
Channel
Channel A
DIMM_A1 & DIMM_A2*
Channel B
DIMM_B1 & DIMM_B2*
DIMM_A1
DIMM_A2*
DIMM_B1
DIMM_B2*
Sockets
1-9