Main Memory - HP Vectra XW Optimization Manual

NOTE
128-bit Memory
2 Technical Reference

Main Memory

Main Memory
The main memory in your system consists of two, four, six or eight
Double Interline Memory Modules (DIMMs). 64 MB or 128 MB of
memory is fitted as standard (two or four 32 MB modules) and can be
upgraded to a maximum of 512 MB. Memory modules are available in
three capacities: 16 MB, 32 MB and 64 MB. The maximum memory
capacity (512 MB) is obtained by installing eight 64 MB DIMM modules.
The DIMM modules used by your HP Vectra XW use a 5 volt power
source. DIMM modules that use a 3.3 volt power source are not
supported and must not be installed.
Each DIMM module stores 64 bits of data plus 8-bits of Error
Correcting Code (ECC) code. Access to the memory modules is
controlled by a memory controller on the processor's local bus. This
controller manages the modules in pairs to create single, 128-bit wide
logical banks.
Memory
controller
Processor's local bus (64-bits)
54 English
128-bits
Memory bank 1
Memory bank 2
Memory bank 3
Memory bank 4
DIMM memory modules