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4 system memory, 1 overview, System memory -11 2.4.1 – Asus P5QC User Manual

Page 37: Overview -11

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ASUS P5QC

2-11

2.4

System memory

2.4.1

Overview

The motherboard comes with two Double Data Rate 3 (DDR3) and four Double

Data Rate 2 (DDR2) Dual Inline Memory Modules (DIMM) sockets.
A DDR3 module has the same physical dimensions as a DDR2/DDR DIMM but

is notched differently to prevent installation on a DDR2/DDR DIMM socket, while

a DDR3/DDR2 module has a 240-pin footprint compared to the 184-pin DDR

DIMM. DDR3 modules are developed for better performance with less power

consumption. The figure illustrates the location of the DDR3/DDR2 DIMM sockets:

Channel

Sockets

Channel A

DIMM_A1 and DIMM_A2

Channel B

DIMM_B1 and DIMM_B2

DDR3 module installation

DDR2 module installation

• You can only install either DDR2 module(s) or DDR3 module(s) on the

motherboard; otherwise, the system will not boot up.

• DDR2 1066MHz DIMMs work only on the black slots for one DIMM per

channel. Ensure to install the DDR2 1066MHz DIMMs ONLY on the BLACK

slots!

Channel

Sockets

Channel A

DDR3_DIMM_A1

Channel B

DDR3_DIMM_B1