Memory; Introduction To Ddr Sdram; Dimm Module Combination - MSI 770 C45 - AM3 AMD 770 HDMI Motherboard User Manual

Hardware Setup

Memory

The mainboard provides 4 slots for 184-pin DDR SDRAM DIMM (Double In-Line Memory
Module) modules and supports the memory size up to 4GB. You can install DDR266/
333/400 modules on the DDR DIMM slots (DDR 1~4).
For the updated supporting memory modules, please visit http://www.msi.com.tw/
program/products/mainboard/mbd/pro_mbd_trp_list.php.
DIMM1~4
(from bottom to top)

Introduction to DDR SDRAM

DDR (Double Data Rate) SDRAM is similar to conventional SDRAM, but doubles 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. High memory bandwidth makes DDR an ideal solution
for high performance PC, workstations and servers.

DIMM Module Combination

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 DIM M 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 below). 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 combination not listed below will function as single-channel DDR.
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