Hardware Upgrades
Installing Additional Memory
The computer comes with Double Data Rate-Synchronous Dynamic Random access
Memory (DDR-SDRAM) Dual Inline Memory Modules (DIMMs).
DIMMs
The memory sockets on the 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.
IF you are adding a second DIMM, it is recommended that you add a DIMM
identical to the preinstalled DIMM in order to achieve a higher performing dual
channel mode. The system board must be populated with DIMMs of identical type
and speed for the system to operate in dual channel mode.
DDR-SDRAM DIMMS
For proper system operation, if the computer supports DDR-SDRAM DIMMs, the
DIMMs must be industry-standard 168-pin, unbuffered PC1600 200 MHz- or PC
2700 333 MHz- compliant CAS Latency 2.5 (CL = 2.5) 2.5 volt DDR-SDRAM
DIMMs. 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.
Hardware Reference Guide
2-7
