Compaq Deskpro AP240, Reference Manual, Page: 96 / 216

5-8 Upgrading the Desktop Workstation
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Installing Additional
Memory
Depending on the model, the workstation comes with:
■ Direct Rambus dynamic random access memory
(RDRAM) Rambus inline memory modules (RIMMs)
■ Synchronous dynamic random access memory
(SDRAM) dual inline memory modules (DIMMs)
RIMMs
The three memory sockets on the Intel 820 chipset–based
system board can be populated with industry-standard RIMMs.
These memory module slots are populated with preinstalled
RIMMs and/or continuity modules (CRIMMs). To achieve the
maximum memory support, you may be required to replace the
preinstalled RIMM and CRIMMs with higher capacity RIMMs.
All slots must be occupied by either memory modules (at least
one) or continuity modules.
For proper system operation, the RIMMs must be industry-
standard 184-pin, PC600–, PC700–, or PC800–compliant
RAMBUS memory modules, depending on the model. They
must also contain the mandatory Joint Electronic Device
Engineering Council (JEDEC) Serial Presence Detect (SPD)
information (1.0 or later). Intel 820 chipset–based Deskpro
Workstation models have one Direct RAMBUS channel that
supports a maximum of 32 devices. The total number of devices
on all RIMMs must be less than or equal to 32. Each RIMM
includes a label that lists the number of devices contained on the
RIMM.
✎
If you install RIMMs of varying speeds, the system will
run at the speed of the slowest installed RIMM.
RIMM upgrade kits are available as options from Compaq.
DIMMs
The memory sockets on the Intel BX chipset–based system
boards can be populated with industry-standard DIMMs. These
memory module slots are populated with at least one
preinstalled memory module. To achieve the maximum memory
support, you may be required to replace the preinstalled DIMM
with a higher capacity DIMM.