Abstract: A fan speed control circuit includes a first fan, a second fan, a first temperature sensor, a second temperature sensor, a PWM regulator, and a driving module. The first temperature sensor senses a temperature of the first component to generate a first temperature signal. The second temperature sensor senses a temperature of a second component to generate a second temperature signal. The PWM regulator is connected to the first temperature sensor and the second temperature sensor. The PWM regulator generates a first PWM signal according to the first temperature signal and generates a second PWM signal according to the second temperature signal. The driving module is connected to the PWM regulator. The driving module generates a first driving voltage provided to the first fan according to the first PWM signal. The driving module also generates a second driving voltage provided to the second fan according to the second PWM signal.

Abstract: A mounting assembly includes a circuit board, a securing member and a heat dissipating device. A retainer is located on the circuit board. The securing member includes a positioning portion and a claw connected to the positioning portion. The heat dissipating device includes a base attached to the circuit board and a number of fins perpendicularly located on the base. The number of fins defines a number of first air paths and a number of second air paths substantially perpendicular to the number of first air paths. The positioning portion is received in at least one of the number of first air paths and at least one of the number of second air paths, and the claw is engaged with the retainer.

Abstract: An electronic device includes a chassis and a bracket. An opening is defined in the chassis. The opening has a first side edge and a second side edge located at opposite sides thereof. A length of the second side edge is greater than that of the first side edge. The bracket is mounted in the opening. The bracket includes a pair of first hooks and a pair of second hooks at opposite sides thereof. A distance between the pair of first hooks corresponds to the length of the first side edge. A distance between the pair of second hooks corresponds to the length of the second side edge. The pair of first hooks is engaged into the opening along the first side edge. The pair of second hooks is engaged into the opening along the second side edge.

Abstract: A heat dissipating apparatus includes a first fan and a second fan. A clipping portion with a block is located on the first fan. A receiving hole is defined in the second fan, and two first retaining panels and a second retaining panel extend from the second fan. The two first retaining panels are substantially parallel to each other and perpendicular to the second retaining panel. The clipping portion is located between the two retaining panels and abuts the first retaining panel, and the block is engaged in the receiving hole.

Abstract: A fan mounting assembly includes a mounting tray and a fan. The mounting tray includes a base plate and at least one mating block protruding from the base plate. The fan includes a housing and a blade accommodated in the housing. The blade is configured to blow air from a first side of the fan to a second side of the fan. The fan having a mating surface located at the second side and mated with the at least one mating block.

Abstract: A heat dissipating apparatus includes a base and a heat pipe. A plurality of fins partially overlaps the base; the heat pipe comprising a first body, a second body and a third body, the second body connected between the first body and the third body; the first body is secured between the plurality of fins and the base, the third body is secured to the plurality of fins, and the second body is located in a first corner between the base and the plurality of fins.

Abstract: A heat dissipating system includes an enclosure, a first fan module, a second fan module of a computer power source. The enclosure has a front panel, a rear panel parallel to the front panel, a side panel, and a top panel. The rear panel defines an output vent therein. A disk drive module is disposed on the front panel and near the top panel. A motherboard with a CPU is disposed on the side panel. The first fan module is configured to dissipate heat generated by the CPU. The second fan module is placed on the rear panel and is aligned with the output vent of the rear panel. The top panel defines a plurality of airflow holes corresponding to the disk drive module. The plurality of the airflow holes is capable of allowing air to flow to the disk drive module for heat dissipating.

Abstract: A computer system includes a chassis, a motherboard, a heat sink and an airflow guiding duct. The chassis includes a chassis bottom wall, a first chassis sidewall, and a second chassis sidewall. The first chassis sidewall defines a first ventilation hole. The second chassis sidewall defines a second ventilation hole. The motherboard with a chip is secured to the chassis bottom wall. The heat sink is secured to the motherboard for cooling the chip. The airflow guiding duct is configured to guide airflow flowing from the second ventilation to the first ventilation hole. A fan is received inside the airflow guiding duct.

Abstract: A computer system includes a chassis and an airflow guiding duct. The chassis includes a chassis bottom wall, a chassis front wall and a chassis rear wall. The chassis front wall defines a first ventilation hole, and the chassis rear wall defines a second ventilation hole. A motherboard is secured to the chassis bottom wall between the chassis front wall and the chassis rear wall. A memory card is secured to the motherboard. The airflow guiding duct is secured in the chassis and includes an entrance portion. The entrance portion covers a portion of the memory card, so as to guide airflow. Airflow flows in the chassis via the first ventilation hole, over the memory card, and then out of the chassis via the second ventilation hole.

Abstract: A heat dissipating device includes a heat sink and a fan. The heat sink includes a base configured to contact a heat generating element, and a plurality of fins extending from the base. The base defines an axis. Each fin includes an end portion extending about the axis of the base in one of a clockwise direction and an anti-clockwise direction. The fan is placed on the heat sink. The fan defines a first opening and a second opening adjacent to the base. The fan is operating and pivoted about the axis of the base in the other one of a clockwise direction and an anti-clockwise direction.

Abstract: A heat dissipating system includes an enclosure, a first fan module, a second fan module of a computer power source. The enclosure has a front panel, a rear panel parallel to the front panel, a side panel, and a top panel. The rear panel defines an output vent therein. A disk drive module is disposed on the front panel and near the top panel. A motherboard with a CPU is disposed on the side panel. The first fan module is configured to dissipate heat generated by the CPU. The second fan module is placed on the rear panel and is aligned with the output vent of the rear panel. The top panel defines a plurality of airflow holes corresponding to the disk drive module. The plurality of the airflow holes is capable of allowing air to flow to the disk drive module for heat dissipating.

Abstract: A computer system includes a chassis, a motherboard, a heat sink and an airflow guiding duct. The chassis includes a chassis bottom wall, a first chassis sidewall, and a second chassis sidewall. The first chassis sidewall defines a first ventilation hole. The second chassis sidewall defines a second ventilation hole. The motherboard with a chip is secured to the chassis bottom wall. The heat sink is secured to the motherboard for cooling the chip. The airflow guiding duct is configured to guide airflow flowing from the second ventilation to the first ventilation hole. A fan is received inside the airflow guiding duct.

Abstract: A computer system includes a chassis and an airflow guiding duct. The chassis includes a chassis bottom wall, a chassis front wall and a chassis rear wall. The chassis front wall defines a first ventilation hole, and the chassis rear wall defines a second ventilation hole. A motherboard is secured to the chassis bottom wall between the chassis front wall and the chassis rear wall. A memory card is secured to the motherboard. The airflow guiding duct is secured in the chassis and includes an entrance portion. The entrance portion covers a portion of the memory card, so as to guide airflow. Airflow flows in the chassis via the first ventilation hole, over the memory card, and then out of the chassis via the second ventilation hole.

Abstract: A heat dissipating device includes a heat sink and a heat sink cover. The heat sink includes a base and a plurality of fins extending from the base. Each of the plurality of fins includes a corner projection. The heat sink cover covers the corner projections of the heat sink.

Abstract: A heat dissipating assembly includes a heat exchanger and an air duct. The heat exchanger includes a plurality of fins aligned in a row, and the fins cooperatively define a plurality of heat dissipating channels. A guiding slot is defined in the heat exchanger. The air duct defines a passage. A positioning hook extends from the air duct and engages in the guiding slot to so that the air duct passage and are aligned with the heat dissipating channels so that an air flow is capable of passing through the air duct passage via the heat dissipating channels.

Abstract: A heat sink includes a plurality of fins parallel to each other. The fins include a top portion having a flange. The opposite ends of each flange are rounded. Two rounded corners are located below the plane defined by the flange.

Abstract: A heat sink includes a plurality of fins parallel to each other. The fins include a top portion having a flange. The opposite ends of each flange are rounded. Two rounded corners are located below the plane defined by the flange.

Abstract: A protective cap for use with a heat sink, includes a cover plate for enclosing thermal grease on the heat sink, and a plurality of strengthening ribs positioned on the cover plate. The strengthening ribs resist the heat sink to prevent the thermal grease from being pressed against the cover plate.

Abstract: A heat dissipating system includes a chassis (10), and a fan (50). The chassis includes a rear plate (14). The rear plate has an inner surface. The fan is secured to the rear plate inside the chassis. A distance is formed between the fan and the inner surface of the rear plate.

Abstract: A heat dissipation device (100) includes a base plate (10), a fin assembly (30), at least one heat pipe (40), and a pair of foot members (20) attached to the base plate. The base plate defines a top surface (12). At least one first channel (18) is defined in the top surface. The fin assembly has a first bottom surface (32). At least one second channel (38) is defined in the first bottom surface corresponding to the at least one first channel. At least one indented portion (324) is defined in the first bottom surface. The at least one heat pipe is received in the first channel and the second channel, and attached through the fin assembly. At least one foot member is attached to the at least one indented portion of the fin assembly.