Patent ID: 8422233
Filing Date: 2013-04-16
Classification: G06F

Abstract:
1. A motherboard system, comprising: a printed circuit board (PCB), the PCB defining a plurality of first holes; a central processing unit (CPU) socket mounted on the PCB for receiving a CPU, the CPU socket defining a plurality of second holes aligned with the respective first holes; a heat dissipating device mounted on the CPU socket for dissipating heat generated by the CPU, the heat dissipating device defining a plurality of third holes respectively aligned with the second holes, each third hole being a stepped hole, and each third hole comprising a first hole portion, a second hole portion aligned with and in communication with the first hole portion, and a first step surface formed between the first and second hole portions, the first hole portion having a diameter less than a diameter of the second hole portion; and a plurality of fastening devices, each fastening device comprising a first fixing portion, a connection member, and a second fixing portion; wherein the fastening devices extend through the corresponding third holes of the heat dissipating device and the second holes of the CPU socket, and are fixed in the corresponding first holes of the PCB; the connection members extend through the heat dissipating device and terminate at the CPU socket, and are received in the corresponding second hole portions of the third holes; the first fixing portions and the second fixing portions are connected to opposite ends of the corresponding connection members, each first fixing portion is inserted in the corresponding second hole and the corresponding first hole for fixing the PCB and the CPU socket together, and each second fixing portion abuts against the corresponding first step surface to fix the heat dissipating device to the CPU socket, thereby fastening the heat dissipating device and the CPU socket to the PCB.