Installing Additional Memory, DIMMs

Hardware Upgrades

Installing Additional Memory

The computer comes with Synchronous dynamic random access memory (SDRAM) dual inline memory modules (DIMMs).

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.

2-6	Hardware Reference Guide

D300 specifications

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