Asus M2A690G installation manual Installing a Dimm, Memory configurations

2.5Installing a DIMM

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

The following figure illustrates the location of the sockets:

DIMM_B2

DIMM_A2

DIMM_B1

DIMM_A1

M2A-VM

112 Pins 128 Pins

240-pin DDR2 DIMM Sockets

Channel	Sockets
Channel A	DIMM_A1 and DIMM_A2
Channel B	DIMM_B1 and DIMM_B2

2.5.1 Memory configurations

You may install up to 4 GB system memory using 256 MB, 512 MB, 1 GB, and 2 GB unbuffered ECC/non-ECC DDR2 DIMMs.

•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 for details.

•Some odd version DDR2-667 DIMMs may not match Intel On-Die- Temination (0DT) requirement and may downgrade to run at DDR2-533. If this happen, contact your retailer for the ODT value.

•This motherboard does not support memory modules made up of 128 Mb chips.

2- Chapter 2: Basic installation