Instruction manual

Hardware Updates
1-2 AlphaServer 1000/1000A Supplement
Note:
A change in the ECC (error correction code) from
longword to quadword allows the code to reside on the
memory modules, eliminating the need for ECC modules on
AlphaServer 1000/1000A Model 5/xxx systems.
When installing memory modules, keep in mind the following rules:
•
A memory option consists of four memory modules.
•
A minimum of one memory bank (four modules) is required.
•
All memory modules within a bank must be of the same size.
•
An ECC SIMM is not compatible with memory bank SIMMs. Do not
place an ECC SIMM in a memory slot.
Figure 1-1 Memory Modules
Bank 3
Bank 2
Bank 1
Bank 0
Unused
SIMM 3
SIMM 2
SIMM 1
SIMM 0
SIMM 3
SIMM 2
SIMM 1
SIMM 0
SIMM 3
SIMM 2
SIMM 1
SIMM 0
SIMM 3
SIMM 2
SIMM 1
SIMM 0
MLO-013455