Installing Main Memory Modules - HP Vectra VE5 3 Supplementary Manual

Installing Main Memory Modules

• The three memory banks must be filled in the order A, B, C.
• Always install a pair of identical modules in bank A. In banks B and C, you
may install a single module or a pair of identical modules.
• Fill as few memory slots as possible, by using high capacity memory mod-
ules, to enable better use of the lowermost ISA backplane slot.
Configuration
C2
C1
B2
FORBIDDEN
B1
A2
A1
C2
C1
B2
B1
A2
A1
C2
C1
B2
B1
A2
A1
Consequences
Installing a single module in A1, leaving A2
empty, allows only 32-bit access, and leads
to very poor performance.
Installing a pair of identical modules in A1
and A2 allows 64-bit access.
Installing a single module in B1, leaving B2
empty,whilst A1 and A2 are filled with an
identical pair of modules is allowed.
Bank A is accessed in 64-bit widths, whilst
bank B is accessed in 32-bit widths.
Filling all banks prevents the use of the
lowest ISA slot.
This restriction can be avoided by replacing
the four modules of banks B and C by a pair
of modules in bank B of greater capacity.
2 Product-Specific Tasks
Installing Main Memory Modules
Rather do
N/A
9