Compaq 470007-802 Making Hardware Changes - Compaq Deskpro Family of Personal - Page 72

Installing Additional Memory, Engineering Council JEDEC Serial Presence Detect SPD

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Installing Additional Memory Depending on the model, the computer comes with: s Direct Rambus dynamic random access memory (RDRAM) Rambus inline memory modules (RIMMs) s 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 industrystandard 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 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 810 and 810e 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. 4-12 Upgrading the Compaq Deskpro EN Series, Desktop Model

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4-12
Upgrading the Compaq Deskpro EN Series, Desktop Model
Installing Additional
Memory
Depending on the model, the computer 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
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 810 and 810e 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.