Abstract: An assembly includes a circuit board, a support perpendicular to the circuit board, and a mounting apparatus including a sliding bracket to accommodate an expansion card, a driving member pivotably mounted to the second support, and a clamping arm mounted to the sliding bracket. The sliding bracket is slidably mounted to the second support, and the driving member is fixed to the sliding bracket. The clamping arm is operable to press or release the expansion card. When the driving member is moved in a first direction, the sliding bracket is moved towards the circuit board, and the expansion card is moved to connect to the circuit board. When the driving member is moved in a second direction opposite to the first direction, the sliding bracket is moved away from the circuit board, and the expansion card disengages from the circuit board.

Abstract: An electronic device includes a chassis, a motherboard, an airflow duct, and an expansion card. The chassis includes a bottom wall, a rear wall, and a sidewall. A motherboard is disposed on the bottom wall, and a riser card perpendicularly connected to the motherboard. An expansion card is parallel to the motherboard and inserted in the riser card. The expansion card has a first end and a second end. The first end is secured to the rear wall of the chassis. An airflow duct is located on the bottom wall of the chassis. The airflow duct includes a mounting wall parallel to the chassis rear wall. The first end of the expansion card is secured to the rear wall, and the second end of the expansion card is mounted to the mounting wall of the airflow duct.