Heat sink assembly with adjustable clip

摘要

A heat sink assembly includes a back plate (10), a clip (20) and a heat sink (50). The back plate is attached below a motherboard (60) on which a CPU (63) is mounted. The heat sink is attached on the CPU. Two posts (13) of the back plate extend through the motherboard and the heat sink. The heat sink includes a base (51) and fins (55). A longitudinal channel (57) is transversely defined through the fins. The base defines a recess (53) under the channel fittingly receiving an annular disc (58) therein. The clip includes a pressing portion (22) received in the channel, and two locking portions (29) engaging with the corresponding posts. A bolt (40) is screwed through the pressing portion to abut against the disc. By adjusting a depth to which the bolt is screwed, the clip can provide adjustable pressure acting on the heat sink.