1-8
Chapter 1: Product introduction
System memory
Overview
This motherboard comes with two Double Data Rate 4 (DDR4) Small Outline Dual Inline
Memory Module (SO-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.
•
Always install a DIMM into the DIMM_A1* slot for the motherboard to work properly.
•
This motherboard supports 1.2V DDR4 SO-DIMMs.
•
Due to the memory address limitation on 32-bit Windows
®
OS, when you install 4GB
or more memory on the motherboard, the actual usable memory for the OS can be
about 3GB or less. For effective use of memory, we recommend that you do any of the
following:
-
Use a maximum of 3 GB system memory if you are using a 32-bit Windows
®
OS.
-
Install a 64-bit Windows
®
OS if you want to install 4GB or more on the
motherboard.
-
For more details, refer to the Microsoft
®
support site at http://support.microsoft.
com/kb/929605/en-us.
•
Refer to
www.asus.com
for the latest Memory QVL (Qualified Vendors List).
Channel
Sockets
Channel A
DIMM_A1*
Channel B
DIMM_B1*
DIMM_A1*
DIMM_B1*