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Additional Information
This section provides information for the additional features that are part of your computer.
Memory Module Guidelines
To ensure optimal performance of your computer, observe the following general guidelines when configuring your
system memory:
• Memory modules must be installed beginning with the first socket.
NOTE: The memory sockets in your computer may be labeled differently depending on the hardware
configuration. For example, A1, A2 or 1,2,3.
NOTE: 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.
Power Supply Unit (PSU) Lock
The PSU lock prevents the removal of the PSU from the chassis.
NOTE: To lock or unlock the PSU, always ensure that the cover of the chassis is removed. For information on
removing the cover, see Removing the cover.
To secure the PSU, remove the screw from the unlock screw location and tighten the screw to the lock location.
Similarly, to unlock the PSU, remove the screw from the lock screw location and tighten the screw to the unlock screw
location.
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