Figure 3-10 24-DIMM Memory Carrier Board Slot IDs

Memory Loading Rules and Guidelines

Use the following rules and guidelines when installing memory:

•Install DIMMs in pairs for the 8-DIMM memory carrier and quads in the 24 DIMM memory carrier.

•Ensure that all DIMMs within a pair or quad are identical.

•Install pairs or quads in order of capacity from largest to smallest. For example, install all 2 GB quads before 1 GB or smaller quads, and install all 1 GB quads before 512 MB quads.

•Side 0 must have equal or greater memory capacity than side 1.

•Install DIMM pairs or quads based on the following rules:

1.Load pairs or quads into the memory carrier in order, starting with slot 0 and ending with slot 2.

2.Install the first pair or quad in side 0.

3.Install the second pair or quad in side 1.

4.For the remaining pairs or quads:

a.If both sides of the memory carrier contain the same capacity of memory, install the next pairs or quad in side 0.

b.If side 0 contains more memory capacity, even though it may have less DIMMs than side 1, install the next pair or quad in side 1.

c.If side 1 is full, install the remaining pairs or quads in side 0.

Table 3-6shows several examples of proper memory carrier loading order.

70 Installing the System