Back to Contents PageMemoryDell™ OptiPlex™ GX620User's GuideDDR2 Memory OverviewAddressing Memory With 4-GB ConfigurationsRemoving MemoryReplacing/Adding Additional MemoryFor information on the type of memory supported by your computer, see the "Memory" section of the specifications for your computer:l Mini Tower Computer Specificationsl Desktop Computer Specificationsl Small Form Factor Computer Specificationsl Ultra Small Form Factor Computer SpecificationsDDR2 Memory OverviewDual-channel DDR2 memory modules should be installed in pairs of matched memory size. If the DDR2 memory modules are not installed with the sameamount of memory in each channel, the computer will continue to operate, but with a slight reduction in performance. See the label in the upper-right corner ofthe module to determine the module's capacity.The recommended memory configurations are:l A pair of matched memory modules installed in connectors DIMM1 and DIMM2orl A memory module installed in connector DIMM1orl For the mini tower, desktop, and small form factor computers, a pair of matched memory modules installed in connectors DIMM1 and DIMM2 and anothermatched pair installed in connectors DIMM3 and DIMM4Be sure to install a single memory module in DIMM1, the connector closest to the processor, before you install modules in the other connectors.NOTICE: Before you install new memory modules, download the most recent BIOS for your computer from the Dell Support website atsupport.dell.com.NOTE: Always install DDR2 memory modules in the order indicated on the system board.NOTICE: Do not install ECC memory modules. Doing so may cause the system not to boot or affect performance.NOTE: The ultra small form factor computer has only two slots which are considered an interleaved pair. The mini tower, desktop, and small form factorcomputers have four slots.
