Abstract: An electrical card for providing a computer system with a signal processing module, includes metallic top and bottom covers, an insulative supporting frame, a circuit board, a first connector, a second connector and a grounding plate. The grounding plate is securely attached to the first connector by engagement between attachment plates of the grounding plate and extension arms of the first connector. The first connector together with the grounding plate are attached to the supporting frame by means of engagement between L-shaped interlocking members of the first connector and L-shaped interlocking recesses of the supporting frame. The supporting bracket is attachably received in the bottom cover, the second connector is mounted to one end of the circuit board, and the circuit board is received within the supporting bracket whereby the grounding plate forms a grounding path from grounding pads of the circuit board to the bottom cover.