DP400 Motherboard
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User’s Manual
4•12
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Installing System Memory
This section details the procedure for installing system
memory on the motherboard. Correct memory configu-
ration is critical for proper system operation. Please re-
view this section carefully and follow the configuration
guidelines precisely.
Memory Specifications
The motherboard has four RIMM module sockets. The
sockets operate in pairs. This motherboard uses Rambus
DRDRAM RIMM modules for system memory. The sys-
tem memory specification are:
• Rambus DRDRAM RIMM modules
• PC600 or PC800
• Maximum 2GB total system memory
Memory Configuration Options
This motherboard has specific memory configuration re-
quirements. These include:
• All sockets must have either RIMM or CRIMM mod-
ules installed in them.
• Module configurations are limited as specified.
• Any capacity RIMM may be used in any socket as
long as total memory does not exceed 2GB.
• Modules should all be the same speed (PC600 or
PC800) for best system performance.
Module Types
There are two modules types:
• RIMM
• CRIMM
The RIMM (Rambus Inline Memory Module) is a Rambus
DRDRAM memory module. The CRIMM (Continuity
Rambus Inline Memory Module) is not a memory mod-
ule. CRIMMs must be installed in all sockets that do not
have RIMMs installed in them. No sockets can remain
empty in this memory design.
Module Configurations
The figures on the next page illustrate the allowed mod-
ule configurations. Do not install modules in any other
configuration. Please note the configurations indicate
module positioning, not capacity. You can install any
mixture of module capacities that does not exceed 2GB.
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