Intel D845PT Quick Reference Manual page 12

4. Align the four black fasteners (A) of the processor fan heatsink RM base
with the corresponding holes in the desktop board (B). Gently press the
base down until all four corners snap into place. Verify that all four
fasteners are fully engaged.
5 Insert the four white locking pushpins into the fasteners and press down to
fully secure the RM base to the desktop board.
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OM12814
Intel Desktop Boards D845PT and D845BG
A
B
OM12629
Quick Reference