52 Removing and Installing Partsw w w . d e l l . c o m | s u p p o r t . d e l l . c o mMemoryYou can increase your computer memory by installing memory modules on the system board. Forinformation on the type of memory supported by your computer, see "Memory" on page 79.NOTE: DDR 333 memory operates at 320 MHz when used with an 800-MHz front-side bus.DDR Memory OverviewDDR memory modules should be installed in pairs of matched memory size. This means that if youpurchased your computer with 128 MB of memory installed and you want to add another 128 MBof memory, you should install it in the appropriate connector. If the DDR memory modules are notinstalled in matched pairs, the computer will continue to operate, but with a slight reduction inperformance.NOTE: Always install DDR memory modules in the order indicated on the system board.NOTE: Your computer has two memory slots labeled DIMM3 and DIMM4.The recommended memory configurations are:• Install a pair of matched memory modules in connectors DIMM3 and DIMM4.• Do not install ECC memory modules.• If you install a mixed pair PC2700 (DDR 333-MHz) and PC3200 (DDR 400-MHz) memory,the modules function at the slowest speed installed.• Be sure to install a single memory module in DIMM3 or the connector closest to theprocessor before you install modules in the other connector.Memory Installation Guidelinesmatched pair of memory modulesin connectors DIMM3 and DIMM4
