IBM 3301690 Dimm Module Installation Purchasing the Memory Module, Memory Configuration Rules

3301690 CPU Card

Step 5: Connect the fan cable on the cooler fan to the CPU fan connector on the CPU card. Make sure the fan cable does not touch any heat generating chips and fan blades. Step 0:

4.3.3DIMM Module Installation

4.3.3.1Purchasing the Memory Module

WARNING!

The DDR2 architecture is not compatible with DDR1 modules. If your system is installed with DDR1 modules, damage might occur and you will not be able to boot up your system.

When you purchase your DIMM modules, the following considerations should be taken into account:

„Each DIMM module can support a memory chip with a maximum size of 1GB

„Dual Channel mode will not be enabled if only one DDR2 memory module is installed. DIMMs must be installed in pairs

„Only use DDR2 memory chips in the DIMM slots

„It is recommended that you use memory modules of identical brand, size, chips, and speed.

„DIMMs must use the same density memory chips

„Both DIMMs must use the same DRAM bus width

„Both DIMMs must be either single-sided or dual-sided.

4.3.3.2Memory Configuration Rules

The 3301690 CPU card has four DIMM modules named as follows (refer to Figure 4-7)

„Channel A: DDR II 1.

„Channel A: DDR II 2.

„Channel B: DDR II 3.

„Channel B: DDR II 4.

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