54 Removing and Installing PartsDDR 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 MB ofmemory, you should install it in the appropriate connector. If the DDR memory modules are not installed inmatched pairs, the computer will continue to operate, but with a slight reduction in performance.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, themodules function at the slowest speed installed.• Be sure to install a single memory module in DIMM3 or the connector closest to the processor beforeyou install modules in the other connector.Memory Installation GuidelinesNOTICE: If you remove your original memory modules from the computer during a memory upgrade, keep themseparate from any new modules that you may have, even if you purchased the new modules from Dell. You shouldinstall your new memory modules in connectors DIMM3 and DIMM4. If possible, do not pair an original memorymodule with a new memory module. Otherwise, your computer may not function at optimal performance.NOTE: Memory purchased from Dell is covered under your computer warranty.matched pair of memory modulesin connectors DIMM3 and DIMM4
