Abstract: A heat sink fastener for securing a heat sink to a CPU holder is constructed to include a stop plate fastened to a transverse groove of the heat sink, the stop plate having longitudinally and transversely extended end notches at the ends and a rectangular locating hole on the middle, a securement member, the securement member having two arched arms engaged into two vertical grooves of the heat sink, the arched arms each having a top notch, which receives one longitudinal end notch of the stop plate, a bottom locating hole, and a hooked end portion hooked in one hook hole of the CPU holder, a spring wire rod, the spring wire rod having two curved ends respectively hooked in the bottom locating holes of the arched arms of the elongated securement member, a U-shaped spring fastened to the rectangular locating hole of the stop plate and engaged into one groove of the heat sink, and a pressure plate fastened to one longitudinal end notch of the stop plate for pressing by the user to force the securement member awa

Abstract: A computer temperature control system installed in a host computer and adapted for controlling the inside temperature of the host computer, the system including cooling fans mounted in the host computer at different locations, a MPU, temperature sensors adapted for detecting the ambient temperature around each cooling fan, an analog-to-digital converter adapted for converting analog temperature signal from each temperature sensor into a corresponding digital temperature signal for comparison with the corresponding pre-set temperature level for enabling the main processing unit to control the revolving speed of the respective cooling fan subject to the respective comparison result.

Abstract: A heat sink fastening device is constructed to include two clamping plates each having two triangular clamping arms adapted for clamping on a holder to hold down a heat sink on the holder, and two hook wires respectively mounted in respective retaining notches in the triangular clamping arms of the clamping plates to hold down the clamping plates, each hook wire having two smoothly arched supporting portions at the ends and two hooking tips respectively horizontally extended from the smoothly arched supporting portions and respectively hooked in respective through holes in the triangular clamping arms of the clamping plates.