Asus P5Q-EM DO - Manual (Page 28)

1-14 Chapter 1: Product introduction
1.7.2 Memory configurations
You may install 512 MB, 1 GB, 2GB, and 4 GB unbuffered non-ECC DDR2 DIMMs into the
DIMM sockets.
Memory reserved by Intel ® ME
Memory slots Total memory occupied by Intel ® ME
DIMM A1 DIMM A2 DIMM B1 DIMM B2 1GB / slot 2GB / slot
Installed 16MB 16MB
Installed 16MB 16MB
Installed 0MB 0MB
Installed 0MB 0MB
Installed Installed 16MB 64MB
Installed Installed 32MB 64MB
Installed Installed 32MB 64MB
Installed Installed 32MB 64MB
Installed Installed 0MB 0MB
Installed Installed 32MB 64MB
Installed Installed Installed 32MB 64MB
Installed Installed Installed 32MB 64MB
Installed Installed Installed 32MB 64MB
Installed Installed Installed 32MB 64MB
Installed Installed Installed Installed 64MB 64MB
• 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.
• Due to the memory address limitation on 32-bit Windows OS, when you install 4GB or
more memory on the motherboard, the actual usable memory for the OS can be about
3GB or less. For effective use of memory, we recommend that you install a 64-bit
Windows OS when having 4GB or more memory installed on the motherboard..
• This motherboard does not support memory modules made up of 256 megabit (Mb)
chips or less.
• This motherboard supports Intel ® ME technology. Your system may detects less
memory size than that you installed when Intel ® ME function is enabled. Refer to the
following table for details.
P5Q-EM DO.indb 14 12/9/08 12:33:42 PM