Asus M2N-VM DH Manual page 26

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Important notice on installing Windows
If you install Windows
limitation of this OS version is that it may reserve a certain amount of
memory space for system devices. We recommend that you install less
than 3 GB system memory if you would like to work under Windows
32-bit version OS. The excess memory installation will not cause any
usage problem, but it will not give users the benefit of manipulating this
excess memory space.
Visit the ASUS FAQ site for further
explanation:
http://support.asus.com/faq/faq.
aspx?SLanguage=en-us
Under General Search, make the
selections as shown, then click
Search. Click the article titled "4GB memory installed but less memory
size detected."
You also may check the URLs below for third party comments on this
issue:
http://dlsvr01.asus.com/pub/ASUS/mb/4GB_Rev1.pdf
http://www.intel.com/support/motherboards/server/sb/cs-016594.htm
This motherboard can support 8 GB physical memory on the operating
systems listed below. You may install a maximum of 2 GB DIMMs on each
slot.
1-16
For dual-channel memory configuration (2), you may:
• install identical DIMMs in all four sockets OR
• install an identical DIMM pair in DIMM_A1 and DIMM_B1 (yellow
sockets) and another identical DIMM pair in DIMM_A2 and
DIMM_B2 (black sockets)
Always use identical DDR2 DIMM pairs for dual-channel model. For
optimum compatibility, we recommend that you obtain memory
modules from the same vendor. Visit the ASUS website (www.asus.
com) for the latest Qualified Vendors List.
®
32-bit
Windows 2000 Advanced Server
®
XP 32-bit version
®
XP 32-bit version Operating System (OS), the
Windows
Edition
Chapter 1: Product introduction
64-bit
XP Professtional x64
®
XP
®