Asus P5LD2 SE 2.4.1 Overview, 2.4.2 Memory configurations, 2.4System memory, P5LD2 SE 240-pinDDR2 DIMM Sockets, The figure illustrates the location of the DDR2 DIMM sockets:

2.4System memory

2.4.1 Overvi ew

The motherboard comes with four Double Data Rate 2 (DDR2) Dual Inline Memory Modules (DIMM) sockets.

A DDR2 module has the same physical dimensions as a DDR DIMM but has a 240-pin footprint compared to the 184-pin DDR DIMM. DDR2 DIMMs are notched differently to prevent installation on a DDR DIMM socket.

The figure illustrates the location of the DDR2 DIMM sockets:

	112 pins
	SE
	P5LD2
	128 pins	A1 A2	B1 B2
		DIMM_ DIMM_	DIMM_ DIMM_
P5LD2 SE 240-pin DDR2 DIMM Sockets
Channel	Sockets
Channel A	DIMM_A1 and DIMM_A2
Channel B	DIMM_B1 and DIMM_B2

2.4.2 Memory confi gurati ons

You may install 256 MB, 512 MB and 1 GB unbuffered non-ECC DDR2 DIMMs into the DIMM sockets.

•For dual-channel configuration, the total size of memory module(s) installed per channel must be the same (DIMM_A1 + DIMM_A2 = DIMM_B1 + DIMM_B2).

•Always install DIMMs with the same CAS latency. For optimum compatibility, it is recommended that you obtain memory modules from the same vendor. Refer to the DDR2 Qualified Vendors List on the next page for details.

•Due to chipset resource allocation, the system may detect less than 4 GB system memory when you installed four 1 GB DDR2 memory modules.

•This motherboard does not support memory modules made up of 128 Mb chips or double sided x16 memory modules.

2-14 Chapter 2: Hardware information