6 
Replacing the CPU 
While replacing the CPU, always turn off the ATX power supply or unplug the power supply’s power 
cord from grounded outlet first to ensure the safety of CPU. 
Memory 
The mainboard provides 2 slots for 184-pin DDR SDRAM DIMM (Double In-Line Memory Module) 
modules and supports the memory size up to 2GB. You can install PC3200/DDR400, PC2700/DDR333, 
or PC2100/DDR266 unbuffered DIMM modules on the DDR DIMM slots (DDR 1~2).  Plugging 
memories in DIMM1 and DIMM2 makes the system reach the optimum system performance. 
For the updated supporting memory modules, please visit 
http://www.msi.com.tw/program/products/mainboard/mbd/pro_mbd_trp_list.php. 
Memory 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 DDR. 
Memory modules can be installed in any combination as follows: 
Slot  Memory Module
64MB~2GB 
 
DIMM1  DIMM2  Max Speed 
Single  x  DDR 400 
x  Single  DDR 400 
Single  Single  DDR 400 
Single  Double  DDR 400 
Double  Single  DDR 400 
Double  Double  DDR 333 
MSI Reminds You... 
The maximum memory speed decreases when both DIMM1 and DIMM2 slots are installed with 
double-sided memory module. 
Please refer to http://www.msi.com.tw/program/products/mainboard/mbd/pro_mbd_trp_list.php for 
compatible DDR modules.