Structure for fixing a backplate

A structure for fixing a backplate and a heat sink to a motherboard, comprising a main body having at least one extended portion, on which at least one retaining arm for retaining said backplate to said motherboard and at least one locating post for retaining said heat sink to said backplate are provided;

• each locating post being located near an outmost portion of an end of the extended portion opposite to the main body, and the retaining arm being located near an outer periphery of the locating post but separate from and not connected to the locating post such that said backplate is retained to said motherboard by a structure different from that retaining said heat sink to said backplate, wherein the locating post has at least one bore therein, and wherein a plurality of internal screw threads is provided in the bore.