System Memory; Overview; Memory Configurations - Asus P5WD2 Installation Manual

2.4

System memory

2.4.1 2.4.1 2.4.1

Overview

Overview Overview
2.4.1 2.4.1 Overview Overview
The motherboard comes with four Double Data Rate 2 (DDR2) Dual Inline
Memory Modules (DIMM) sockets.
A DDR2 module has the same physical dimensions as a DDR DIMM but has a
240-pin footprint compared to the 184-pin DDR DIMM. DDR2 DIMMs are
notched differently to prevent installation on a DDR DIMM socket.
The figure illustrates the location of the DDR2 DIMM sockets:
P5WD2 240-pin DDR2 DIMM sockets
C h a n n e l C h a n n e l C h a n n e l
C h a n n e l C h a n n e l
C h a n n e l A C h a n n e l A C h a n n e l A C h a n n e l A C h a n n e l A
C h a n n e l B C h a n n e l B C h a n n e l B C h a n n e l B C h a n n e l B
2.4.2 2.4.2

Memory configurations

Memory configurations
2.4.2 2.4.2 2.4.2 Memory configurations Memory configurations Memory configurations
You may install 256 MB, 512 MB, 1 GB, and 2 GB unbuffered ECC and
non-ECC DDR2 DIMMs into the DIMM sockets.
• For dual-channel configuration, the total size of memory module(s)
installed per channel must be the same (DIMM_A1 + DIMM_A2 =
DIMM_B1 + DIMM_B2).
• Always install DIMMs with the same CAS latency. For optimum
compatibility, it is recommended that you obtain memory modules
from the same vendor. Refer to the DDR2 Qualified Vendors List on
the next page for details.
• Due to chipset resource allocation, the system may detect less than
8 GB system memory when you installed four 2 GB DDR2 memory
modules.
• This motherboard does not support memory modules made up of
128 Mb chips or double sided x16 memory modules.
2 - 1 4 2 - 1 4 2 - 1 4
2 - 1 4 2 - 1 4
®
S o c k e t s S o c k e t s S o c k e t s
S o c k e t s S o c k e t s
D I M M _ A 1 a n d D I M M _ A 2 D I M M _ A 1 a n d D I M M _ A 2 D I M M _ A 1 a n d D I M M _ A 2 D I M M _ A 1 a n d D I M M _ A 2 D I M M _ A 1 a n d D I M M _ A 2
D I M M _ B 1 a n d D I M M _ B 2 D I M M _ B 1 a n d D I M M _ B 2 D I M M _ B 1 a n d D I M M _ B 2 D I M M _ B 1 a n d D I M M _ B 2 D I M M _ B 1 a n d D I M M _ B 2
C h a p t e r 2 : H a r d w a r e i n f o r m a t i o n C h a p t e r 2 : H a r d w a r e i n f o r m a t i o n C h a p t e r 2 : H a r d w a r e i n f o r m a t i o n
C h a p t e r 2 : H a r d w a r e i n f o r m a t i o n C h a p t e r 2 : H a r d w a r e i n f o r m a t i o n