Memory; Memory Overview - Dell Dimension 9150 Owner's Manual

Memory

You can increase your computer memory by installing memory modules on the system board.For
information on the type of memory supported by your computer, see "Specifications."

Memory Overview

• Memory modules should be installed in pairs of matched memory size, speed, and technology. If
the memory modules are not installed in matched pairs, the computer will continue to
operate, but with a slight reduction in performance. See the label in the upper-right corner of
the module to determine the module's capacity.
NOTE:
The recommended memory configurations are:
– A pair of matched memory modules installed in connectors DIMM_1 and DIMM_2
or
– A pair of matched memory modules installed in connectors DIMM_1 and DIMM_2 and
another matched pair installed in connectors DIMM_3 and DIMM_4
• If you install mixed pairs of DDR2 400-MHz (PC2-3200), DDR2 533-MHz (PC2-4300) and
DDR2 667-MHz (PC2-5300) memory, the modules function at the slowest speed installed.
• Be sure to install a single memory module in the DIMM_1 connector, the connector closest to
the processor, before you install modules in the other connectors.
• While installing memory modules, ensure that you do not mix ECC and non-ECC memory.
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Removing and Installing Parts
Always install memory modules in the order indicated on the system board.