Asus V Series, User Manual

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2-8 Chapter 2: Basic installation
2.5 Installing a DIMM
The system motherboard comes with two Double Data Rate 2 (DDR2) Dual
Inline Memory Module (DIMM) sockets.
The following figure illustrates the location of the sockets:
2.5.1 Memory configurations
You may install 256 MB, 512 MB, 1 GB, and 2 GB unbuffered non-ECC DDR2
DIMMs into the DIMM sockets.
R
P5B-VM
240-pin DDR2 DIMM Sockets
DIMM_A2 DIMM_B1 DIMM_B2 DIMM_A1
11
2 Pins
128 Pins
• 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 optimum
compatibility, it is recommended that you obtain memory modules
from the same vendor.
• If you install four 1 or 2GB memory modules, the system may only
recognize less than 3GB because the address space is reserved for
other critical functions. This limitation appears on Windows
®
XP 32-bit
operation system which does not support Physical Address Extension
(PAE).
• If you install Windows
®
XP 32-bit operation system, a total memory
of less than 3GB is recommended.
• This motherboard does not support memory modules made up of
128 Mb chips or double sided x16 memory modules.