Introduction To Ddr Sdram; Ddr Population Rules - MSI 865PE Neo3-F User Manual

The mainboard provides 4 slots for 184-pin, 2.5V DDR DIMM with 8 memory
banks. You can install DDR266 / DDR333 / DDR400 / DDR433 / DDR466 / DDR500 /
DDR533 SDRAM modules on the DDR DIMM slots (DIMM 1~4). To operate properly, at
least one DIMM module must be installed. Please note that DDR433 / DDR466 /
DDR500 / DDR533 are for overclocking spec.
DDR DIMM Slots
(DIMM 1~4, from left to right)
Channel A: DIMM1 & DIMM2 (green)
Channel B: DIMM3 & DIMM4 (purple)

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 does not
support ECC (error correcting code) and 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.2-8). 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.
Memory
Hardware Setup
E-2-7