9-20 Upgrading Your Server

Installation Order

DIMMs must be populated in pairs and in the following order: #7 and #8, #5 and #6, #3 and #4, then #1 and #2.

Install DIMMs starting from the one having smallest capacity.

FRONT

REAR

Group #1

DIMM #1

DIMM #2

 

Group #2

DIMM #3

DIMM #4

 

Group #3

DIMM #5

DIMM #6

 

Group #4

DIMM #7

DIMM #8

Mother board

IMPORTANT: Install two additional DIMMs for each group*1 because the server uses interleaved memory. If DIMMs of different specifications*2 are installed in a bank, the server does not operate normally.

*1 A group is a unit of two DIMM slots. Each pair of DIMM slots #1 and #2 (group #1), #3 and #4 (group #2), #5 and #6 (group #3), and #7 and #8 (group #4) in the figure is a group. (The symbols are also printed on the mother board.)

*2 DIMM specification is shown on the label attached to the DIMM as follows:

Example: Frequency of 400 MHz, buffered, capacity of 512 MB, row address of 12 bits, column address of 10 bits, and single side

400 / B / 512 / R12 C10 S

Single side

Column address

Row address

Capacity

Buffered

Frequency