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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
conguration. 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 OS 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 congurations
You may install 512 MB, 1 GB, and 2 GB unbuffered DDR3 DIMMs into the DIMM
sockets.
Recommended Memory Congurations
Mode
Sockets
DIMM_A1 DIMM_A2 DIMM_B1 DIMM_B2
Single-Channel
Populated — — —
— — Populated —
Dual-channel (1) Populated — Populated —
Dual-channel (2) Populated Populated Populated Populated