Installing the memory – Dell OptiPlex 990 (Early 2011) User Manual
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Installing The Memory
1. Insert the memory modules into the connectors on the system board. Install
the memory modules in the order of A1 > B1 > A2 > B2.
2. Press down on the memory modules until the retention clips spring back to
secure them in place.
3. Install the
4. Install the
5. Install the
.
After Working Inside Your Computer
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