Dell OptiPlex GX260 Series System User's Manual page 153

1 pin-1 corners of microprocessor and socket aligned
NOTICE: Microprocessor pins are delicate. To avoid damage, ensure that the microprocessor aligns properly with the
socket, and do not use excessive force when you install the processor.
3. Carefully set the microprocessor in the socket and press it down lightly to seat it.
4. Rotate the release lever back toward the system board until it snaps into place, securing the microprocessor.
5. Install the heat sink.
a. Insert the notched end of the heat sink onto the end of the retention base that is opposite the hinge.
b. Lower the heat sink until it fits securely in the base.
6. Raise the retention lever and press until the heat sink is secured. You will feel the lever pause once it is at a 90-degree
angle. Keep pressing on the lever another 30 degrees, ensuring that it is in the locked position.
Heat Sink Replacement