Asus P5E64 WS Professional User Manual

Page 40

2-14

Chapter 2: Hardware information

• 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 1GB memory modules, the system may only recognize

less than 3GB of total memory because of address space allocation for

other critical functions. This limitation appears on Windows

Vista 32-bit /

Windows

XP 32-bit operation systems since it does not support Physical

Address Extension (PAE) mode.

• If you install Windows

Vista 32-bit / 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.

• Due to chipset limitation, this motherboard can only support up to

8 GB on the operating systems listed below. You may install a maximum of

2 GB DIMMs on each slot.

64-bit

Windows

XP Professional x64 Edition

Windows

Vista x64 Edition

2.4.2

Memory configurations

You may install 512 MB, 1 GB, and 2 GB unbuffered DDR3 DIMMs into the DIMM

sockets.
Recommended Memory Configurations

Mode

Sockets

DIMM_A1

DIMM_A2

DIMM_B1

DIMM_B2

Single-Channel

Populated

—

Populated

—

Dual-channel (1)

Populated

—

Populated

—

Dual-channel (2)

Populated