Main Memory - HP Vectra VE5 3 Series Technical Reference Manual

Upgrades

Main Memory

There are six main memory module sockets, arranged in three banks
(A to C), allowing installation up to 192 MB. One bank is already occupied
by the pair of memory modules that contain the 8 or 16 MB of memory that
is fitted as standard (depending on the model of the computer).
Fast access, with the timing pattern 7-2-2-2, is achieved by installing 60 ns
extended data-out (EDO) dynamic random-access memory (DRAM).
There is no parity detecting logic for the main memory on this computer.
Memory bank A should always be filled with a pair of modules of identical
size, width, density and technology (EDO) for full 64-bit operation. It is
possible to install a single module in slot A1, but this will severely reduce the
performance of the computer, restricting memory access to a 32-bit width.
Banks B and C can each be either occupied with a pair of identical modules,
or with a single module in the B1 (or C1) slot leaving the B2 (or C2) slot
empty (bank B must be occupied before bank C). The single-module option
allows for a cheaper upgrade path for main memory, but again restricts bank
access to 32-bits. However, since the majority of accesses are to bank A, the
impact on the computer performance is minimized.
Operating System
Windows 3.11
Windows 95
Windows NT
OS/2
It is better to upgrade memory by replacing low capacity modules with ones
of higher capacity. In this way, the B and C banks can be kept free. If only
bank A is occupied, the lowermost ISA slot can be used for the installation of
AT boards (12.2 cm / 4.8 inches wide). If banks A and B are occupied, this
slot becomes partially blocked, and can only be used for the installation of
XT boards (10.7 cm / 4.2 inches wide). If banks A, B and C are all occupied,
the lowermost ISA slot becomes completely blocked, and cannot be used
(except for boards that are less than 9 cm / 3.6 inches wide).
The Setup program automatically detects which memory module capacity,
and speed is installed in each bank. Individual pages of memory can be
configured as cacheable or non-cacheable by software or hardware. They
can also be enabled and disabled by hardware or software.
2 System Board
Devices on the Processor-Local Bus
Recommended Memory Capacity
8 MB
8 to 12 MB
12 to 16 MB
16 MB
17