Installing Additional Memory; Dimms - Compaq Evo D300 Hardware Reference Manual

Hardware Upgrades

Installing Additional Memory

DIMMs

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2–6
The computer comes with Synchronous dynamic random access
memory (SDRAM) dual inline memory modules (DIMMs).
The memory sockets on the Intel 815E and 845 chipset-based system
board 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.
For proper system operation, the DIMMs must be industry-standard
168-pin, PC133- compliant SDRAM DIMMs, depending on the
model. The SDRAM DIMMs must support CAS Latency 2 or 3
(CL = 2 or CL = 3). They must also contain the mandatory Joint
Electronic Device Engineering Council (JEDEC) Serial Presence
Detect (SPD) information. DIMMs constructed with x4 SDRAM are
not supported; the system will not start using unsupported DIMMs.
CAUTION: Some models support ECC memory and some support
non-ECC memory. For those systems that do support ECC, Compaq
does not support mixing ECC and non-ECC memory. Doing so will
cause the system to blink the NUMLOCK LED on the keyboard
continuously and, if a speaker is installed in the system, there will be a
short beep followed by 2 long beeps. In addition, the system will not
boot the operating system.
Hardware Reference Guide