Asus P5Q-EM DO manual Memory configurations, Memory reserved by Intel ME

1.7.2Memory configurations

You may install 512 MB, 1 GB, 2GB, and 4 GB unbuffered non‑ECC DDR2 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 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.

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

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Chapter 1: Product introduction

12/9/08 12:33:42 PM