Dell Vostro 260 (Mid 2011) - Manual (Page 40)

Installing The Processor
1. Align the two notches on the processor and insert it into the socket, the processor
should slide in and fit into the socket without any force.
NOTE: The processor is notched at one end with a triangle marking. The same
marking is also notched on the processor socket.
2. Close the processor cover.
3. Press the release lever down and move it inwards to secure it with the retention
hook.
4. Place the heat sink and fan assembly on the processor.
5. Tighten the captive-screws that secure the heat sink and fan assembly to the
system board.
6. Connect the heat sink and fan assembly cable to the system board.
7. Replace the cover .
8. Follow the procedures in After Working Inside Your Computer .
40