A heat dissipation assembly includes a heat sink (10), a fan (70),
and a mounting device for attaching the fan to the heat sink. The mounting device
includes four clips (30), and four shafts (50) pivotably connecting
the clips to the heat sink. Each clip includes a main body (31), a top pressing
portion (39), and a bottom mounting portion (43). A tab (45)
is upwardly formed from a center of the mounting portion. Two parallel connecting
portions (33) extend outwardily from two side edges of the main body respectively.
The tabs of the mounting portions of the clips abut against the fan in corresponding
through holes (72) thereof. The pressing pardons of the clips press an upper
face of the fan at corresponding through holes thereof. Thus the fan is securely
mounted on the heat sink between the pressing portion and the mounting portion
of each of the clips.