System information

7-24
AlphaServer 800 Service Guide
7.2.8 Memory Modules
The position of the failing dual-inline memory modules (DIMMs) are reported by the
SROM power-up scripts (Section 2.2.2) or can be determined using the procedures
described with the memexer command (Section 3.2.5).
Note the following memory configuration rules when replacing memory:
• At least one memory bank must contain a memory option.
• A memory option consists of four DIMMs (0, 1, 2, and 3).
• All DIMMs in a bank must be of the same capacity and part number.
STEP 1: RECORD THE POSITION OF THE FAILING DIMM.
STEP 2: LOCATE THE FAILING DIMM ON THE MOTHERBOARD.
STEP 3: REPLACE THE FAILING DIMMS.
Figure 7-18 Memory Slots on Motherboard
DIMM 3
DIMM 2
DIMM 1
Bank 1
Bank 0
IP00071A
DIMM 0
DIMM 3
DIMM 2
DIMM 1
DIMM 0
WARNING: CPU and memory modules have parts that operate at high
temperatures. Wait 2 minutes after power is removed before handling these
modules.
CAUTION: Do not use any metallic tools or implements including pencils to release
DIMM latches. Static discharge can damage the DIMMs.