1. An electronics card, comprising: a printed circuit board; a processing unit attached to the circuit board and extending from the circuit board by a first height; a frame: disposed to surround the processing unit without contacting the processing unit, made from a rigid material, and extending from the circuit board by a second height that is less than the first height; a heat sink urged against a top of the processing unit; a first set of fasteners affixing the frame to the circuit board; a second set of fasteners coupling the heat sink to the circuit board independently from the frame; and a resilient pad disposed in a clearance formed between a top of the frame and a bottom of the heat sink and compressed into engagement with the frame top and the heat sink bottom for dampening rocking of the heat sink.