Dell GX280DT - GX280 Desktop Computer User Manual page 221

NOTICE: You must position the processor correctly in the socket to avoid permanent damage to the processor and the computer when you turn on the
computer.
9. If the release lever on the socket is not fully extended, move it to that position.
10. Orient the front and rear alignment notches on the processor with the front and rear alignment notches on the socket.
11. Align the pin-1 corners of the processor and socket.
1 processor cover 6 release lever
2 tab 7 front alignment notch
3 processor 8 socket and processor pin-1 indicator
4 socket 9 rear alignment notch
5 center cover latch
NOTICE: To avoid damage, ensure that the processor aligns properly with the socket, and do not use excessive force when you install the processor.
12. Set the processor lightly in the socket and ensure that the processor is positioned correctly.
13. When the processor is fully seated in the socket, close the processor cover.
Ensure that the tab on the processor cover is positioned underneath the center cover latch on the socket.
14. Pivot the socket release lever back toward the socket and snap it into place to secure the processor.
NOTICE: If you are not installing a processor upgrade kit from Dell, reuse the original heat sink assembly when you replace the processor.
If you installed a processor replacement kit from Dell, return the original heat sink assembly and processor to Dell in the same package in which your
replacement kit was sent.
15. Reinstall the two screws that attach the blower to the heat sink.
16. Install the heat sink/blower assembly:
a. Place one end of the heat sink under the tab on one side of the retention base.
b. Lower the heat sink until the heat sink fits securely under the tab on the retention base.
c. Insert the securing clip by placing the notched end of the clip opposite the tab into the slot on the retention base. Press the securing clip tab and
lower the securing clip into place. Ensure that the notched ends of the securing clip are secured in the retention base slots.
NOTE: Your computer's heat sink may differ in appearance than illustrated below, but is removed and reinstalled in the same manner.