MSI K9A PLATINUM User Guide - Page 13

English Installation Guide Memory 2 DDR Specification : 184-pin, 2.5v. Single channel definition : All DIMM slots are GREEN color. Dual channels definition : DIMM slot(s) on Channel A are marked in GREEN color. DIMM slot(s) on Channel B are marked in Purple color. 40x2=80 pin 52x2=104 pin 3 DDRII Specification : 240-pin, 1.8v. Single channel definition : All DIMM slots are GREEN color. Dual channels definition : DIMM slot(s) on Channel A are marked in GREEN color. DIMM slot(s) on Channel B are marked in Orange color. 64x2=128 pin 56x2=112 pin Important -DDRII modules are not interchangeable with DDR and the DDRII standard is not backward compatible, you should always install DDRII memory module in the DDRII DIMM slot and install DDR memory module in the DDR DIMM slot. - In dual-channel mode, make sure that you install memory modules of the same type and density in different channel DDR DIMM slots. - To enable successful system boot-up, always insert the memory modules into the DIMM1 first. Installing DDR/ DDRII Modules You can find the notch on the memory modules and the volt on the DIMM slots whether DDR or DDRII. Follow the procedures below to install the DDR/ DDRII module properly. 1. The DDR/DDRII modules has only one notch on the center of module. The module will only fit in the right orientation. 2. Insert the memory module vertically into the DIMM slot. Then push it in until the golden finger on the memory module is deeply inserted in the DIMM slot. 3. The plastic clip at each side of the DIMM slot will automatically close. Volt Notch En-5