Cold plate

A method of forming a cold plate, comprising:

• stamping an interface plate from sheet metal, wherein the interface plate is configured for arrangement on an electronics assembly, wherein the interface plate comprises a plurality of active areas arranged for alignment over respective heat-generating portions of the electronics assembly and non-active areas between the active areas;
• affixing a plurality of cooling fins to the interface plate at each of the plurality of active areas;
• stamping an opposing plate from sheet metal;
• joining edges of the first and opposing plates, wherein edges of the interface plate and the opposing plate form a plenum therebetween, wherein the plenum defines a cooling fluid flow axis from a first end of the plenum to the second end of the plenum, wherein the plenum includes active plenum volumes aligned with the active areas of the interface plate and non-active plenum volumes aligned with the non-active areas of the interface plate, wherein a first width of the active plenum volumes in a first transverse direction to the cooling fluid flow axis is larger than a second width of the non-active plenum volumes in the first transverse direction, and wherein the surfaces of the cooling fins are arranged along the cooling fluid flow axis.