Asus P8B-X, User Manual

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2-16 Chapter 2: Hardware information
2.4 System memory
2.4.1 Overview
The motherboard comes with four Double Data Rate 3 (DDR3) Dual Inline Memory
Modules (DIMM) sockets.
A DDR3 module has the same physical dimensions as a DDR2 DIMM but is
notched differently to prevent installation on a DDR2 DIMM socket. DDR3 modules
are developed for better performance with less power consumption.
The figure illustrates the location of the DDR3 DIMM sockets:
2.4.2 Memory Configurations
You may install 1 GB, 2 GB, 4 GB, 8GB Unbuffered with ECC DDR3 DIMMs into
the DIMM sockets using the memory configurations in this section.
UDIMM
DIMM Slot
Per Channel
DIMM Populated
per Channel
DIMM Type Speed Rank per DIMM
2 1 Unbuffered DDR3 ECC 1066/1333 Single Rank,
Dual Rank
2 2 Unbuffered DDR3 ECC 1066/1333 Single Rank,
Dual Rank
• Always install DIMMs with the same CAS latency. For optimum
compatibility, it is recommended that you obtain memory modules from the
same vendor.
• Install the DDR to the A2 or B2 (orange slot) when installing only one
memory module to the motherboard.