Memory; Introduction To Ddr Sdram; Ddr Population Rules - MSI KT880 Delta User Manual

MS-7047 ATX Mainboard
The mainboard provides 3 slots for 184-pin DDR SDRAM DIMM (Double In-
Line Memory Module) modules and supports the memory size up to 3GB. You can
install DDR400 / 333 / 266 modules on the DDR DIMM slots (DIMM 1~3).
For the updated supporting memory modules, please visit http://www.msi.
com.tw/program/products/mainboard/mbd/pro_mbd_trp_list.php.

Introduction to DDR SDRAM

DDR (Double Data Rate) SDRAM is similar to conventional SDRAM, but dou-
bles the rate by transferring data twice per cycle. It uses 2.5 volts as opposed to 3.
3 volts used in SDR SDRAM, and requires 184-pin DIMM modules rather than 168-pin
DIMM modules used by SDR SDRAM. Please note that the DDR SDRAM can support
ECC (error correcting code), but does not support registered DIMM.

DDR Population Rules

Install at least one DIMM module on the slots. Each DIMM slot supports up to a
maximum size of 1GB. Users can install either single- or double-sided modules to
meet their own needs. Please note that each DIMM can work respectively for
single-channel DDR, but there are some rules while using dual-channel
DDR (Please refer to the suggested DDR population table on p.2-7). Users may install
memory modules of different type and density on different-channel DDR DIMMs.
However, the same type and density memory modules are necessary while
using dual-channel DDR, or instability may happen.
Please refer to the following table for detailed dual-channel DDR. Other com-
bination not listed below will function as single-channel DDR.
2-6

Memory

DDR DIMM Slots DIMM 1~3
(from left to right)