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ASUS P5Q3 Deluxe/WiFi-AP@n 2-13
2.4.2 Memory congurations
You may install 1GB, 2GB and 4GB unbuffered and non-ECC DDR3 DIMMs into
the DIMM sockets.
• 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.
• It is recommended to install the memory modules from the yellow slots for
better overclocking capability.
• 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 GB 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/Vista 32-bit operation
system which does not support Physical Address Extension (PAE).
• If you install Windows
®
XP/Vista 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.
• Due to chipset limitation, this motherboard can only support up to 16 GB
on the operating systems listed below. You may install a maximum of 4 GB
DIMMs on each slot.
64-bit
Windows
®
XP Professional x64 Edition
Windows
®
Vista x64 Edition
• The default memory operation frequency is dependent on its SPD. Under
the default state, some memory modules for overclocking may operate at a
lower frequency than the vendor-marked value.
• The memory modules may require a better cooling system to work stably
under full loading (4 DIMMs) or overclocking setting.