Back to Contents PageRemoving and Installing PartsDell™ Dimension™ 5100 Service ManualMemoryYou can increase your computer memory by installing memory modules on the system board.Your computer supports DDR2 memory. For additional information on the type of memory supported by your computer, see your Owner's Manual.DDR2 Memory OverviewDDR2 memory modules should be installed in pairs of matched memory size, speed, and technology. If the DDR2 memory modules are not installed in matchedpairs, the computer will continue to operate, but with a slight reduction in performance. See the label on the module to determine the module's capacity.The recommended memory configurations are:¡ A pair of matched memory modules installed in DIMM connectors 1 and 2or¡ A pair of matched memory modules installed in DIMM connectors 1 and 2 and another matched pair installed in DIMM connectors 3 and 4l If you install mixed pairs of DDR2 400-MHz (PC2-3200) and DDR2 533-MHz (PC2-4300) memory, the modules function at the slowest speed installed.l Be sure to install a single memory module in DIMM connector 1, the connector closest to the processor, before you install modules in the otherconnectors.Memory CD/DVD DriveCards Heat-Sink AssemblyDrive Panel ProcessorFront Panel Fan AssemblyDrives Front I/O PanelHard Drive System BoardFloppy Drive Power SupplyMedia Card Reader (Optional)NOTE: Always install DDR2 memory modules in the order indicated on the system board.NOTICE: Do not install ECC or buffered memory modules. Only unbuffered, non-ECC memory is supported.NOTE: If you install DDR2 667-MHz memory, the speed is reduced to 533 MHz.NOTE: Memory purchased from Dell is covered under your computer warranty.