Asus CUV266-D User Manual download pdf (Page 21)

ASUS CUV266-D User’s Manual 21

3. HARDWARE SETUP

System Memory

3. H/W SETUP

3.5 System Memory

This motherboard supports unbuffered Double Data Rate (DDR) Dual Inline Memory

Modules (DIMMs). Four DDR DIMM sockets are available for 2.5V (power level)

DDR Synchronous Dynamic Random Access Memory (DDR SDRAM) of 64, 128,

256, 512MB, or 1GB densities for a system memory configuration up to 4GB.

Install non-ECC memory in any combination as follows:

DIMM Location 184-pin DDR DIMM Total Memory

Socket 1 (Rows 0&1) 64MB, 128MB, 256MB, 512MB, (1GB) x1

Socket 2 (Rows 2&3) 64MB, 128MB, 256MB, 512MB, (1GB) x1

Socket 3 (Rows 4&5) 64MB, 128MB, 256MB, 512MB, (1GB) x1

Socket 4 (Rows 6&7) 64MB, 128MB, 256MB, 512MB, (1GB) x1

Total System Memory Using DDR DIMMs (Max. 4GB) =

3.5.1 DDR SDRAM Notes

The DDR SDRAM technology evolved from the mainstream PC66, PC100, PC133

memory known as Single Data Rate (SDR) SDRAM. DDR memory however, has

the ability to perform two data operations in one clock cycle, thus providing twice

the throughput of SDR memory. For example, a 200MHz DDR DIMM will support

a 100MHz memory bus, and a 266MHz DDR DIMM will support a 133MHz memory

bus.

A DDR DIMM has the same physical dimensions as an SDR DIMM, but it has a

184-pin footprint compared to the 164-pin of the SDR DIMM. Also, a DDR DIMM

is single notched while an SDR DIMM is double notched. Therefore, a DDR DIMM

is not backward compatible with SDR, and should be installed only in a socket

specially designed for DDR DIMMs.

DDR DIMMs are available in both unbuffered and registered versions.

WARNING! Make sure that the DIMM you use can handle the specified DDR

SDRAM speeds, otherwise, the computer will not boot.

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Asus CUV266-D User Manual Page 21