NOTICE: You must position the processor correctly in the socket to avoid damaging the processor and the system board when you turn on the system. Be careful not to touch or bend the pins on the socket.

4Set the processor lightly in the socket and ensure that the processor is level in the socket. When the processor is positioned correctly, press it gently to seat it in the socket.

5Close the processor cover.

6Rotate the release lever back down until it snaps into place, securing the processor cover.

NOTICE: Do not operate the system without the heat sink installed. The heat sink is required to maintain proper thermal conditions.

7Prepare the heat sink for installation:

•If you are reusing the heat sink from the previous processor, ensure that the contact side (bottom) of the heat sink is clean, open the thermal grease packet, and apply thermal grease to the bottom of the heat sink.

•If you received a replacement heat sink, remove the protective sheet from the thermal grease layer that is pre-applied to the bottom of the heat sink.

8Lower the heat sink onto the processor. See Figure 3-22.9Secure the heat sink to the retention module.

a Gently press down on the heat sink and then press one securing clip to secure it. b Repeat step a for the remaining securing clip.

10Ensure that the back fan connector is connected to the BACK_FAN connector on the system board. See "System Board Connectors" on page 118.

11Install the cooling shroud. See "Installing the Cooling Shroud" on page 65.12Close the system. See "Closing the System" on page 47.13Stand the system upright.

14Reconnect the system to its electrical outlet and turn the system on, including any attached peripherals.

15Enter the System Setup program, and ensure that the processor options match the new system configuration. See "Using the System Setup Program" on page 29.

As the system boots, it detects the presence of the new processor and automatically changes the system configuration information in the System Setup program. A message similar to the following appears:

One 2.8 GHz Processor, Processor Bus: 533 MHz, L2 cache 256 KB

16Confirm that the top line of the system data area in the System Setup program correctly identifies the installed processor. See "Using the System Setup Program" on page 29.

17Exit the System Setup program.18Ensure that your system is running the latest BIOS version.

You can download the latest BIOS version from the Dell Support website located at support.dell.com

82Installing System Components