2.4System memory

2.4.1 Overview

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

The following figure illustrates the location of the DDR DIMM sockets.

DIMM A1

DIMM A2

DIMM B1

DIMM B2

Pins

 

 

 

 

80

NCCH-DL

 

 

 

Pins

 

 

 

 

104

NCCH-DL 184-pin DDR DIMM sockets

2.4.2 Memory configurations

You may install unbuffered ECC or non-ECC 64MB, 128MB, 256MB, 512MB, and 1GB DDR DIMMs into the DIMM sockets using the recommended memory configurations.

Important notes

1.Installing DDR DIMMs other than the recommended configurations may cause memory sizing error or system boot failure. Use any of the recommended configurations in Table 1.

2.In dual-channel configurations, install only identical (the same type and size) DDR DIMM pairs for each channel.

3.Always install DIMMs with the same CAS latency. For optimum compatibility, it is recommended that you obtain memory modules from the same vendor.

4.Make sure that the memory frequency matches the CPU FSB (Front Side Bus). Refer to Table 2.

5.DIMMs installed into any three sockets will function in single- channel mode.

6.When all four sockets are populated with 1GB DIMMs (total 4GB), the system may detect only about 3.6+ GB (less than 4 GB) due to resource allocation on onboard devices.

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Chapter 2: Hardware setup