HP Integrity rx1600 Operation and Maintenance Guide

Chapter 7

Removing and Replacing Components

Removing and Replacing System Memory

137

Supported DIMM Sizes

Supported DIMM sizes are 256MB, 512MB, 1GB, and 2GB. Dissimilar DIMM sizes may be used across the entire system

board but both DIMMs in each pair must match.

The memory subsystem supports chip spare functionality. Chip spare enables an entire SDRAM chip on a DIMM to be

bypassed (logically replaced) in the event that a multi-bit error is detected on that SDRAM.

In order to use the chip spare functionality, only DIMMs built with x4 SDRAM parts can be used, and these DIMMs must be

loaded in quads (2 DIMMs per memory cell, loaded in the same location in each memory cell).

Each DIMM within a quad must be identical to all the other DIMMs in the quad.

Figure 7-5 DIMM Slot Identification

Removing System Memory

To remove system memory, perform the following steps:

Step 1. Identify the DIMM to be removed and push the appropriate extraction levers found on either side of the DIMM

slot outward to the open position. The DIMM will eject from the slot.

Step 2. Remove the DIMM from the socket.

Installing System Memory

To install DIMMs, perform the following steps:

Step 1. Align the DIMM with the socket located on the system board.

Rear

Front

Pair 4

Pair 1

Pair 3

Pair 2