Installing Additional Memory; Dimms - Compaq 470022-515 - Evo - D300 Hardware Reference Manual

Installing Additional Memory

DIMMs

Ä
Hardware Reference Guide
The computer comes with synchronous dynamic random access
memory (SDRAM) dual inline memory modules (DIMMs).
The memory sockets on the Intel 815e 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, unbuffered PC100- or 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.
The Intel 815e chipset supports both PC100 and PC133 SDRAM
DIMMs. PC133 DIMMs should be used for optimal operation. If both
PC100 and PC133 SDRAM DIMMs are installed in a computer, the
system memory will run at the lower 100Mhz speed. Some
configurations of PC133 SDRAMs may run at 100Mhz, instead of
133Mhz.
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 Upgrades
2–7