1-10
1.4
System memory
This motherboard comes with six Double Data Rate 4 (DDR4) Dual Inline Memory Module
(DIMM) sockets. The figure illustrates the location of the DDR4 DIMM sockets:
Channel
Sockets
Channel A
DIMM_A1_1 & DIMM_A1_2
& DIMM_A2 *
Channel B
DIMM_B1_1 & DIMM_B1_2
& DIMM_B2 *
DIMM_A1_1
DIMM_A1_2
DIMM_A2 *
DIMM_B1_1
DIMM_B1_2
DIMM_B2 *
•
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.
•
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.
•
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.
•
Actual memory data rate depends on the CPU types and DRAM modules, for more
information refer to www.asus.com
for the Memory QVL (Qualified Vendors Lists).
Recommended Dual Channel Memory Configuration
DIMM_A2 *
DIMM_A1_1
DIMM_A1_2
DIMM_B2 *
DIMM_B1_1
DIMM_B1_2
A1_1
A1_2
A2*
B1_1
B1_2
B2*
4
Modules
x
SS
SS
x
SS
SS
(SS=Single-Sided, “x”=No Memory)
Chapter 1: Product Introduction